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Everything you need to know about space travel (almost)

We're a long way from home...

Paul Parsons

When did we first start exploring space?

The first human-made object to go into space was a German V2 missile , launched on a test flight in 1942. Although uncrewed, it reached an altitude of 189km (117 miles).

Former Nazi rocket scientists were later recruited by both America and Russia (often at gunpoint in the latter case), where they were instrumental in developing Intercontinental Ballistic Missiles (ICBMs) – rockets capable of carrying nuclear weapons from one side of the planet to the other.

It was these super-missiles that formed the basis for the space programmes of both post-war superpowers. As it happened, Russia was the first to reach Earth orbit, when it launched the uncrewed Sputnik 1 in October 1957, followed a month later by Sputnik 2, carrying the dog Laika – the first live animal in space.

The USA sent its first uncrewed satellite, Explorer 1, into orbit soon after, in January 1958. A slew of robotic spaceflights followed, from both sides of the Atlantic, before Russian cosmonaut Yuri Gagarin piloted Vostok 1 into orbit on 12 April 1961, to become the first human being in space . And from there the space race proper began, culminating in Neil Armstrong and Buzz Aldrin becoming the first people to walk on the Moon as part of NASA's Apollo programme .

Why is space travel important?

Space exploration is the future. It satisfies the human urge to explore and to travel, and in the years and decades to come it could even provide our species with new places to call home – especially relevant now, as Earth becomes increasingly crowded .

Extending our reach into space is also necessary for the advancement of science. Space telescopes like the Hubble Space Telescope and probes to the distant worlds of the Solar System are continually updating, and occasionally revolutionising, our understanding of astronomy and physics.

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But there are also some very practical reasons, such as mining asteroids for materials that are extremely rare here on Earth.

One example is the huge reserve of the chemical isotope helium-3 thought to be locked away in the soil on the surface of the Moon . This isotope is a potential fuel for future nuclear fusion reactors – power stations that tap into the same source of energy as the Sun. Unlike other fusion fuels, helium-3 gives off no hard-to-contain and deadly neutron radiation.

However, for this to happen the first challenge to overcome is how to build a base on the Moon. In 2019, China's Chang’e 4 mission marked the beginning of a new space race to conquer the Moon, signalling their intent to build a permanent lunar base , while the NASA Artemis mission plans to build a space station, called Lunar Orbital Platform-Gateway , providing a platform to ferry astronauts to the Moon's surface.

Could humans travel into interstellar space and how would we get there?

It’s entirely feasible that human explorers will visit the furthest reaches of our Solar System. The stars, however, are another matter. Interstellar space is so vast that it takes light – the fastest thing we know of in the Universe – years, centuries and millennia to traverse it. Faster-than-light travel may be possible one day, but is unlikely to become a reality in our lifetimes.

It’s not impossible that humans might one day cross this cosmic gulf, though it won’t be easy. The combustion-powered rocket engines of today certainly aren’t up to the job – they just don’t use fuel efficiently enough. Instead, interstellar spacecraft may create a rocket-like propulsion jet using electric and magnetic fields. This so-called ‘ ion drive ’ technology has already been tested aboard uncrewed Solar System probes.

Another possibility is to push spacecraft off towards the stars using the light from a high-powered laser . A consortium of scientists calling themselves Breakthrough Starshot is already planning to send a flotilla of tiny robotic probes to our nearest star, Proxima Centauri, using just this method.

Though whether human astronauts could survive such punishing acceleration, or the decades-long journey through deep space, remains to be seen.

How do we benefit from space exploration?

Pushing forward the frontiers of science is the stated goal of many space missions . But even the development of space travel technology itself can lead to unintended yet beneficial ‘spin-off’ technologies with some very down-to-earth applications.

Notable spin-offs from the US space programme, NASA, include memory foam mattresses, artificial hearts, and the lubricant spray WD-40. Doubtless, there are many more to come.

Read more about space exploration:

• The next giant leaps: The UK missions getting us to the Moon
• Move over, Mars: why we should look further afield for future human colonies
• Everything you need to know about the Voyager mission
• 6 out-of-this-world experiments recreating space on Earth

Space exploration also instils a sense of wonder, it reminds us that there are issues beyond our humdrum planet and its petty squabbles, and without doubt it helps to inspire each new generation of young scientists. It’s also an insurance policy. We’re now all too aware that global calamities can and do happen – for instance, climate change and the giant asteroid that smashed into the Earth 65 million years ago, leading to the total extinction of the dinosaurs .

The lesson for the human species is that we keep all our eggs in one basket at our peril. On the other hand, a healthy space programme, and the means to travel to other worlds, gives us an out.

Is space travel dangerous?

In short, yes – very. Reaching orbit means accelerating up to around 28,000kph (17,000mph, or 22 times the speed of sound ). If anything goes wrong at that speed, it’s seldom good news.

Then there’s the growing cloud of space junk to contend with in Earth's orbit – defunct satellites, discarded rocket stages and other detritus – all moving just as fast. A five-gram bolt hitting at orbital speed packs as much energy as a 200kg weight dropped from the top of an 18-storey building.

And getting to space is just the start of the danger. The principal hazard once there is cancer-producing radiation – the typical dose from one day in space is equivalent to what you’d receive over an entire year back on Earth, thanks to the planet’s atmosphere and protective magnetic field.

Add to that the icy cold airless vacuum , the need to bring all your own food and water, plus the effects of long-duration weightlessness on bone density, the brain and muscular condition – including that of the heart – and it soon becomes clear that venturing into space really isn’t for the faint-hearted.

When will space travel be available to everyone?

It’s already happening – that is, assuming your pockets are deep enough. The first self-funded ‘space tourist’ was US businessman Dennis Tito, who in 2001 spent a week aboard the International Space Station (ISS) for the cool sum of $20m (£15m).

Virgin Galactic has long been promising to take customers on short sub-orbital hops into space – where passengers get to experience rocket propulsion and several minutes of weightlessness, before gliding back to a runway landing on Earth, all for $250k (£190k). In late July 2020, the company unveiled the finished cabin in its SpaceShipTwo vehicle, suggesting that commercial spaceflights may begin shortly.

Meanwhile, Elon Musk’s SpaceX , which in May 2020 became the first private company to launch a human crew to Earth orbit aboard the Crew Dragon , plans to offer stays on the ISS for $35k (£27k) per night. SpaceX is now prototyping its huge Starship vehicle , which is designed to take 100 passengers from Earth to as far afield as Mars for around $20k (£15k) per head. Musk stated in January that he hoped to be operating 1,000 Starships by 2050.

10 Short Lessons in Space Travel by Paul Parsons is out now (£9.99, Michael O'Mara)

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Space Tourism: Can A Civilian Go To Space?

2021 has been a busy year for private space tourism: overall, more than 15 civilians took a trip to space during this year. In this article, you will learn more about the space tourism industry, its history, and the companies that are most likely to make you a space tourist.

What is space tourism?

Brief history of space tourism, space tourism companies, orbital and suborbital space flights, how much does it cost for a person to go to space, is space tourism worth it, can i become a space tourist, why is space tourism bad for the environment.

Space tourism is human space travel for recreational or leisure purposes . It’s divided into different types, including orbital, suborbital, and lunar space tourism.

However, there are broader definitions for space tourism. According to the Space Tourism Guide , space tourism is a commercial activity related to space that includes going to space as a tourist, watching a rocket launch, going stargazing, or traveling to a space-focused destination.

The first space tourist was Dennis Tito, an American multimillionaire, who spent nearly eight days onboard the International Space Station in April 2001. This trip cost him $20 million and made Tito the first private citizen who purchased his space ticket. Over the next eight years, six more private citizens followed Tito to the International Space Station to become space tourists.

As space tourism became a real thing, dozens of companies entered this industry hoping to capitalize on renewed public interest in space, including Blue Origin in 2000 and Virgin Galactic in 2004. In the 2000s, space tourists were limited to launches aboard Russian Soyuz aircraft and only could go to the ISS. However, everything changed when the other players started to grow up on the market. There are now a variety of destinations and companies for travels to space.

There are now six major space companies that are arranging or planning to arrange touristic flights to space:

• Virgin Galactic;
• Blue Origin;
• Axiom Space;
• Space Perspective.

While the first two are focused on suborbital flights, Axiom and Boeing are working on orbital missions. SpaceX, in its turn, is prioritizing lunar tourism in the future. For now, Elon Musk’s company has allowed its Crew Dragon spacecraft to be chartered for orbital flights, as it happened with the Inspiration4 3-day mission . Space Perspective is developing a different balloon-based system to carry customers to the stratosphere and is planning to start its commercial flights in 2024.

Orbital and suborbital flights are very different. Taking an orbital flight means staying in orbit; in other words, going around the planet continually at a very high speed to not fall back to the Earth. Such a trip takes several days, even a week or more. A suborbital flight in its turn is more like a space hop — you blast off, make a huge arc, and eventually fall back to the Earth, never making it into orbit. A flight duration, in this case, ranges from 2 to 3 hours.

Here is an example: a spaceflight takes you to an altitude of 100 km above the Earth. To enter into orbit — make an orbital flight — you would have to gain a speed of about 28,000 km per hour (17,400 mph) or more. But to reach the given altitude and fall back to the Earth — make a suborbital flight — you would have to fly at only 6,000 km per hour (3,700 mph). This flight takes less energy, less fuel; therefore, it is less expensive.

• Virgin Galactic: $250,000 for a 2-hour suborbital flight at an altitude of 80 km;
• Blue Origin: approximately $300,000 for 12 minutes suborbital flight at an altitude of 100 km;
• Axiom Space: $55 million for a 10-day orbital flight;
• Space Perspective: $125,000 for a 6-hour flight to the edge of space (32 km above the Earth).

The price depends, but remember that suborbital space flights are always cheaper.

What exactly do you expect from a journey to space? Besides the awesome impressions, here is what you can experience during such a trip:

• Weightlessness . Keep in mind that during a suborbital flight you’ll get only a couple of minutes in weightlessness, but it will be truly fascinating .
• Space sickness . The symptoms include cold sweating, malaise, loss of appetite, nausea, fatigue, and vomiting. Even experienced astronauts are not immune from it!
• G-force . 1G is the acceleration we feel due to the force of gravity; a usual g-force astronauts experience during a rocket launch is around 3gs. To understand how a g-force influences people , watch this video.

For now, the most significant barrier for space tourism is price. But air travel was also once expensive; a one-way ticket cost more than half the price of a new car . Most likely, the price for space travel will reduce overtime as well. For now, you need to be either quite wealthy or win in a competition, as did Sian Proctor, a member of Inspiration4 mission . But before spending thousands of dollars on space travel, here is one more fact you might want to consider.

Rocket launches are harmful to the environment in general. During the burning of rocket fuels, rocket engines release harmful gases and soot particles (also known as black carbon) into the upper atmosphere, resulting in ozone depletion. Think about this: in 2018 black-carbon-producing rockets emitted about the same amount of black carbon as the global aviation industry emits annually.

However, not all space companies use black carbon for fuel. Blue Origin’s New Shepard rocket has a liquid hydrogen-fuelled engine: hydrogen doesn’t emit carbon but simply turns into water vapor when burning.

The main reason why space tourism could be harmful to the environment is its potential popularity. With the rising amount of rocket launches the carbon footprint will only increase — Virgin Galactic alone aims to launch 400 of these flights annually. Meanwhile, the soot released by 1,000 space tourism flights could warm Antarctica by nearly 1°C !

Would you want to become a space tourist? Let us know your opinion on social media and share the article with your friends, if you enjoyed it! Also, the Best Mobile App Awards 2021 is going on right now, and we would very much appreciate it if you would vote for our Sky Tonight app . Simply tap "Vote for this app" in the upper part of the screen. No registration is required!

The future of spaceflight—from orbital vacations to humans on Mars

NASA aims to travel to the moon again—and beyond. Here’s a look at the 21st-century race to send humans into space.

Welcome to the 21st-century space race, one that could potentially lead to 10-minute space vacations, orbiting space hotels , and humans on Mars. Now, instead of warring superpowers battling for dominance in orbit, private companies are competing to make space travel easier and more affordable. This year, SpaceX achieved a major milestone— launching humans to the International Space Station (ISS) from the United States —but additional goalposts are on the star-studded horizon.

Private spaceflight

Private spaceflight is not a new concept . In the United States, commercial companies played a role in the aerospace industry right from the start: Since the 1960s, NASA has relied on private contractors to build spacecraft for every major human spaceflight program, starting with Project Mercury and continuing until the present.

Today, NASA’s Commercial Crew Program is expanding on the agency’s relationship with private companies. Through it, NASA is relying on SpaceX and Boeing to build spacecraft capable of carrying humans into orbit. Once those vehicles are built, both companies retain ownership and control of the craft, and NASA can send astronauts into space for a fraction of the cost of a seat on Russia’s Soyuz spacecraft.

SpaceX, which established a new paradigm by developing reusable rockets , has been running regular cargo resupply missions to the International Space Station since 2012. And in May 2020, the company’s Crew Dragon spacecraft carried NASA astronauts Doug Hurley and Bob Behnken to the ISS , becoming the first crewed mission to launch from the United States in nearly a decade. The mission, called Demo-2, is scheduled to return to Earth in August. Boeing is currently developing its Starliner spacecraft and hopes to begin carrying astronauts to the ISS in 2021.

Other companies, such as Blue Origin and Virgin Galactic , are specializing in sub-orbital space tourism. Test launch video from inside the cabin of Blue Origin’s New Shepard shows off breathtaking views of our planet and a relatively calm journey for its first passenger, a test dummy cleverly dubbed “Mannequin Skywalker.” Virgin Galactic is running test flights on its sub-orbital spaceplane , which will offer paying customers roughly six minutes of weightlessness during its journey through Earth’s atmosphere.

With these and other spacecraft in the pipeline, countless dreams of zero-gravity somersaults could soon become a reality—at least for passengers able to pay the hefty sums for the experience.

Early U.S. Spaceflight

Looking to the moon

Moon missions are essential to the exploration of more distant worlds. After a long hiatus from the lunar neighborhood, NASA is again setting its sights on Earth’s nearest celestial neighbor with an ambitious plan to place a space station in lunar orbit sometime in the next decade. Sooner, though, the agency’s Artemis program , a sister to the Apollo missions of the 1960s and 1970s, is aiming to put the first woman (and the next man) on the lunar surface by 2024.

For Hungry Minds

Extended lunar stays build the experience and expertise needed for the long-term space missions required to visit other planets. As well, the moon may also be used as a forward base of operations from which humans learn how to replenish essential supplies, such as rocket fuel and oxygen, by creating them from local material.

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Such skills are crucial for the future expansion of human presence into deeper space, which demands more independence from Earth-based resources. And although humans have visited the moon before, the cratered sphere still harbors its own scientific mysteries to be explored—including the presence and extent of water ice near the moon's south pole, which is one of the top target destinations for space exploration .

NASA is also enlisting the private sector to help it reach the moon. It has awarded three contracts to private companies working on developing human-rated lunar landers—including both Blue Origin and SpaceX. But the backbone of the Artemis program relies on a brand new, state-of-the-art spacecraft called Orion .

Archival Photos of Spaceflight

Currently being built and tested, Orion—like Crew Dragon and Starliner—is a space capsule similar to the spacecraft of the Mercury, Gemini, and Apollo programs, as well as Russia’s Soyuz spacecraft. But the Orion capsule is larger and can accommodate a four-person crew. And even though it has a somewhat retro design, the capsule concept is considered to be safer and more reliable than NASA’s space shuttle—a revolutionary vehicle for its time, but one that couldn’t fly beyond Earth’s orbit and suffered catastrophic failures.

Capsules, on the other hand, offer launch-abort capabilities that can protect astronauts in case of a rocket malfunction. And, their weight and design mean they can also travel beyond Earth’s immediate neighborhood, potentially ferrying humans to the moon, Mars, and beyond.

A new era in spaceflight

By moving into orbit with its Commercial Crew Program and partnering with private companies to reach the lunar surface, NASA hopes to change the economics of spaceflight by increasing competition and driving down costs. If space travel truly does become cheaper and more accessible, it’s possible that private citizens will routinely visit space and gaze upon our blue, watery home world—either from space capsules, space stations, or even space hotels like the inflatable habitats Bigelow Aerospace intends to build .

The United States isn’t the only country with its eyes on the sky. Russia regularly launches humans to the International Space Station aboard its Soyuz spacecraft. China is planning a large, multi-module space station capable of housing three taikonauts, and has already launched two orbiting test vehicles—Tiangong-1 and Tiangong-2, both of which safely burned up in the Earth’s atmosphere after several years in space.

Now, more than a dozen countries have the ability to launch rockets into Earth orbit. A half-dozen space agencies have designed spacecraft that shed the shackles of Earth’s gravity and traveled to the moon or Mars. And if all goes well, the United Arab Emirates will join that list in the summer of 2020 when its Hope spacecraft heads to the red planet . While there are no plans yet to send humans to Mars, these missions—and the discoveries that will come out of them—may help pave the way.

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Why We Should Be Spending More on Space Travel

L et’s stipulate one thing: there’s absolutely no reason for us to go to space. It does nothing to feed us, to clothe us, to protect us, to heal us. It’s dangerous and hideously expensive too, a budget-busting luxury that policy makers and administrators have spent decades trying to defend—always unsuccessfully because the fact is, there’s no practical defense for it. So stand down the rockets, take down the space centers, pocket the money and let’s move on. Still want the adventure of going to space? That’s what they make movies for.

Now that we’ve established that, let’s stipulate the opposite: Space is precisely where the human species ought to be going. We accept that we’re a warring species. We accept that we’re a loving species. We accept that we’re an artistic and inventive and idiosyncratic species. Then we surely must accept that we’re a questing species. Questing species don’t much care for being stuck on one side of an ocean and so they climb aboard boats—indeed they invent boats—to cross it. They don’t much care for having their path blocked by a mountain and so they climb it for no reason other than finding out what’s on the other side. Accept that, and you can’t not accept that we have to embrace space.

April 12 marks the 60th anniversary of the day Yuri Gagarin became the first human being in space , taking off in his Vostok 1 spacecraft, spending 88 minutes making a single orbit of the Earth, and returning home to a species that seemed forever been changed by his efforts. The date will mark, too, the 60th anniversary of the by-now familiar argument that journeys like Gagarin’s and all of the ones that followed achieve nothing that can be touched and pointed to as a practical dividend of the effort made and the resources expended.

I found myself turning the old debate this way and that over the last week, when I was reading a column in the Guardian with the provocative headline, “Revive the U.S. space program? How about not,” by essayist Nicholas Russell. It opens with a mention of Gil Scott-Heron’s 1970 spoken word poem, “Whitey on the Moon,” which compellingly lamented the hard social truth that the U.S. was spending $24 billion in 1960s money on the Apollo program at the same time 10% of Americans were living in poverty, with Blacks suffering at three times the rate of whites.

“Was all that money I made last year (for Whitey on the moon?)” Scott-Heron wrote. “How come there ain’t no money here? (Hm! Whitey’s on the moon.)”

Russell goes on to cite the estimated cost of the new Artemis lunar program , which some analysts have placed at $30 billion; the role—a troubling one as he sees it—of the military in so many space projects, and the ongoing scourge of racism and inequality on Earth that persists while we still keep looking spaceward. Then he mentions, by way of caution, a University of Arizona proposal to send seed, spore, sperm and egg samples of 6.7 million terrestrial species to the moon as a sort of space ark in case life on Earth should come to an end. “When the vastness of space is cited as a means of escape from disaster, it’s exceedingly difficult not to believe nihilism acts as the prime motivator,” Russell argues. “Rather than sparking inspiration, it speaks of blatant fatalism about what is worth saving, a preference for the lofty and unpopulated … with delusions of innovation and heroism.”

Russell is right about some things—especially about the continuing blight of racism. But expenditures on space and expenditures on social programs have never been a zero-sum proposition, any more than any dollar the U.S. government spends on anything at all—the military, farm subsidies, tax cuts for corporations—is by definition a dollar not spent on something else. And the Artemis price tag is indeed high—but only if you look at it as a standalone figure. In the context of the federal budget? NASA funding currently accounts for just 0.4% of the total the government spends each year—down from 4% in the golden era of Apollo. The military’s role in the space program is inevitable, even if Russell sees it as regrettable. Rockets are rockets, after all, and physics is physics, and if the first machines that blasted humans off the Earth were originally designed as ballistic missiles, well, that was what the U.S. and the U.S.S.R. had on the shelf. What’s more, every Soviet R-7 rocket or American Atlas that was used to send an astronaut or cosmonaut to orbit was one fewer that could be used in a theater of war.

And as for that space ark? Well yes, it does suggest a certain fatalism. But the fact is, we are eminently capable of screwing the global pooch, to paraphrase the old Mercury astronauts. Unless you’re confident that no autocrat or hermit king with nuclear weapons and a button in reach won’t do something impulsive, storing the Earth’s genetic essence for safekeeping does not seem like a completely insane idea.

That doesn’t mean space exploration is inherently nihilistic, however. Look at the old footage of the global reaction to the Apollo 11 moon landing . Watch the worldwide relief when the Apollo 13 crew —three people the vast majority of the planet had never met—made it home safely. Consider the reaction today when a rover lands on Mars or a spacecraft whizzes past Pluto or a pair of women aboard the space station perform the first all-female spacewalk.

Yes, we can live without traveling to space. Indeed, we did perfectly well over all of the millennia that preceded April 12, 1961. We can meet most of our needs when we stay on Earth—we can raise our families and earn our salaries and feed our bellies. But we feed something less literal, more lyrical when we extend ourselves as far as we can. Once that meant crossing an ocean. Now it means more. Space is out there—and we should be too.

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3 predictions for the future of space exploration — including your own trips

Alejandra Marquez Janse

Mary Louise Kelly

Tinbete Ermyas

Peggy Whitson says more widely available space tourism is realistic. Axiom Space hide caption

Peggy Whitson says more widely available space tourism is realistic.

If you've ever traveled somewhere that left you so enthralled that you wanted to go back over and over, then you get how Peggy Whitson feels about space.

She is a seasoned astronaut who has multiple achievements under her belt: She was the first woman to command the International Space Station, and in 2017 broke the record for most cumulative days in space of any American and female astronaut, with a count of 665.

Whitson retired from NASA nearly five years ago, but last month, at age 63, she packed up the necklace she wore on her wedding day, zipped her spacesuit one more time, and took flight in a SpaceX capsule as commander of the Ax-2 mission. It was sponsored by a private company, Axiom Space, where she now works as the director of human spaceflight. Three paying crew members traveled with her.

After returning to Earth, Whitson spoke with All Things Considered host Mary Louise Kelly and shared a few thoughts about the future of space exploration.

This interview has been edited slightly for clarity and brevity.

The Ax-2 crew in a training session. The group, composed of Whitson (far left) and three paying costumers, spent nine days in space last month. Axiom Space hide caption

The Ax-2 crew in a training session. The group, composed of Whitson (far left) and three paying costumers, spent nine days in space last month.

1. Space exploration will be a mix of public and private money

If you look at even the NASA missions returning to the moon, lots of different private space companies are involved in that process. And that includes Axiom Space, for instance, who are building the spacesuits that will be used by the NASA astronauts as they step on the moon again. So it's exciting to be part of this changing philosophy of space and the efforts of commercial companies like Axiom Space. We intend to build the first commercial space station initially attached to the International Space Station, but to undock before the space station is decommissioned.

I think it's a worldwide relationship between different companies and peoples, and that's what makes it such a special time to be a part of the [Ax-2] mission, because [space exploration] is changing flavor and it's exciting because there are going to be many more opportunities in the future.

The Ax-2 crew returns to Earth. Could this be you one day? Axiom Space hide caption

2. More people will be able to go to space

Obviously some of it will take time to make it not cost-prohibitive, but the fact that we are taking those initial steps is really important now. If you look back at commercial aviation and how that occurred and the development of that process, you know, it also started off to be only a few people could be involved and then later more and more, and so now it's pretty commonplace. I like to think that we're doing some of the same steps in commercial spaceflight now.

3. The goals depend on the person — and the country — that's traveling

Well, the objective of the mission is slightly different, obviously. My personal roles and responsibilities of taking care of the crew and ensuring their safety obviously are very similar. But our objectives were, we had one private astronaut, John Shoffner, who was trying to develop science, technology, engineering and math (STEM) outreach products for educators in the future, as well as doing research. And then we had two government sponsored astronauts from Saudi Arabia – the first female Saudi Arabian to fly in space and go to the International Space Station – and the second male to arrive.

SpaceX mission returns from space station with ex-NASA astronaut, 3 paying customers

So the objectives of the crew weren't all that much different necessarily than a NASA mission, which is outreach and scientific investigations, but these were with the specific goals of expanding outreach in specific areas for Saudi – which hadn't had a person in space for 40 years – and, you know, to inspire their youth as well as inspiring the youth in the United States.

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Future of space travel: What will it be like?

More than 60 years have passed since the first human space flight, but the future of space travel is still being written since only about 600 people have been in orbit so far. For most people willing to experience space travel, this wish remains an unattainable dream. But let’s remember that cars, planes, and trains, available to everyone today, seemed a fantasy once. So will space tourism ever be a reality? It already is. More than that, it has been around for 20 years. Orbital Today will shortly remind you of the story and try to look into the future of space travel.

How it all started

A 37-year-old American English and biology teacher Sharon McAuliffe could become the first space tourist, on winning the “Teacher in Space” competition in 1984. By that time, US astronauts had made 55 successful space flights, and their safe return to Earth had become commonplace. to increase public’s interest in the industry and demonstrate space flight reliability, NASA decided to send the first civilian into space. But it all ended in tragedy. On 28th January 1986, 73 seconds after launch, the Challenger’s fuel tank exploded, killing all seven crew members, including McAuliffe. The practice of sending amateurs into space has been abandoned for many years, and the space tourism future was put on hold.

The second attempt took place in April 2001. American businessman Dan Tito paid Space Adventures a whopping $20 million for a seat on a Russian Soyuz rocket to go to the ISS. The journey lasted ten days, eight of which Tito spent at the station in zero gravity at an altitude of 400km from the Earth in the company of professional astronauts. From 2002 to 2009, another 7 millionaires and billionaires followed his example, but after that, no one wanted to part with a significant sum for years.

The tipping point occurred in the summer of 2021 when private aerospace companies Virgin Galactic and Blue Origin sent their first tourists into space, and while these flights were suborbital, they still determined the future of space tourism trends.

Unlike the $20 million eight-day trip to the ISS, Jeff Bezos and Richard Branson’s companies offer to spend only three minutes in zero gravity, but the fare is also way lower – $200,000. At the same time, Virgin VSS Unity flight takes 2.5 hours, and Blue Origin New Shepard’s – 11 minutes. This time difference is explained by different launch technologies. Virgin uses an air-launch system (similar to an aeroplane), while Blue Origin uses a classic vertical rocket launch. One thing these two have in common is that both offer to enjoy the view of Earth and starts from space, through panoramic windows from a height of more than 60km.

Virgin has made only one tourist launch so far, while Blue Origin carried out three. The pricing policy has fully justified itself. Seats in the suborbital shuttles of both companies are sold out several years in advance.

As the era of suborbital flights officially began, the interest in orbital flights rekindled. Unwilling to lag behind its main competitors, in September 2021, Space X hastened to launch the first Inspiration 4 orbital mission. The mission implied that four tourists stay on the Crew Dragon ship in orbit for three days. Following in Elon Musk’s footsteps, the Russian Soyuz MS 20 delivered Japanese billionaire Yusaka Maezawa and his assistant to the ISS. This marked an important milestone for space tourism in the future.

What is the future of space tourism?

A study by Northern Sky Research (NSR) analysts suggests that over the next 10 years, about 60,000 passengers will go into space, and the total income from space tourism will be about 20 billion US dollars. What will the future of space travel look like?

Suborbital transportation

Private companies will continue to improve suborbital flight technologies, reducing their cost and improving the quality. However, despite this, interest in suborbital tourism is unlikely to last long due to limited supply. The Blue Origin and Virgin Galactic spacecraft can carry a maximum of six people (including two Virgin pilots) and offer only three minutes in zero gravity. Besides, the ships do not cross the Karman line (100km), beyond which real space begins. However, there is hope.

Experts believe that future space travel technology will be able to replace long air flights. In 2020, SpaceX announced its Starship rocket currently in development will be able to take up to 100 passengers on board and deliver them from one continent to another in less than an hour. More specifically, a 15-hour flight to Shanghai from New York on Starship will take only 40 minutes. If Blue Origin and Virgin Galactic follow the same path, while providing adequate service costs, the demand for suborbital flights will grow steadily.

Orbital vacation

As more companies consider space tourism, orbital vacations will become one of the future space tourism trends. Orbital infrastructure for recreation, including hotels in orbit and on the moon, could become profitable. Interest in the ISS in this regard is already reemerging. In addition, Orion Span and Blue Origin are developing luxury space hotel concepts called Aurora Station and Orbital Reef . Of course, vacations in space are still far away, but many tourists can already visit space themed hotels on Earth. The best of them are located in China, the USA, Canada, and Switzerland.

Will space tourism ever be affordable?

No doubt, only multi millionaires can afford such trips today. Paying 200 thousand dollars for 3 minutes in weightlessness or 20 million for 8 days in space is not something everyone can easily afford. A century ago, ordinary people could hardly pay for a ticket across the Atlantic, and flying on planes was even more expensive. Today, such trips no longer surprise anyone. Once space tourism becomes mainstream, it will also have a positive impact on many socio-economic processes on Earth: job creation, development of new energy infrastructure based on solar energy, etc. This will increase the scale of opportunity and innovation, boost competition, and ultimately make space travel available for ordinary citizens.

Is space tourism a good idea after all?

Every industry has positive and negative aspects, and space travel is no exception. Despite the prospects and benefits, this industry calls for careful risk assessment. Let’s take a look at the main facts about future space travel.

1. High expenses

Blue Origin and Virgin Galactic flights require huge investments in infrastructure and technology that are not paying off at this stage. How much does it cost for space tourism? It is difficult to say, but the costs are in the tens of billions. In fact, these are very expensive toys of billionaires. Of course, they can afford such a luxury at the expense of other, highly profitable businesses, but imagine if this money was spent on more pressing issues, i.e., fighting poverty, hunger, medicine, etc.

2. Passenger health

While astronauts take years to prepare for flights, private individuals will fly with minimal instruction. However, heavy workloads and zero-gravity conditions greatly affect health. According to a recent study involving British astronaut Tim Peake , space travel causes more than a third of astronauts to experience temporary anemia due to the destruction of large numbers of red blood cells. While astronauts remain in a state of weightlessness, this does not cause any problems, but the symptoms appear on Earth, under the influence of gravity. This threatens not only the development of space tourism but also the idea of ​​colonising planets since it creates an increased risk for passengers experiencing conditions exacerbated by anemia. Here, we are, first of all, talking about cardiovascular pathologies, which, according to WHO, top the list of common diseases. In other words, you need to be not only rich but absolutely healthy to fly into space. The combination of these factors significantly reduces the number of potential space tourism customers.

3. Environmental impact

A rocket burns hundreds of tons of fuel to overcome the Earth’s gravity and leave the atmosphere. Of course, humanity is inventing ever-more environmentally friendly fuels, but emissions in the upper atmosphere still destroy the ozone layer and provoke global warming. And although the level of emissions from rockets is less than 1% compared with cars, the development of space tourism will inevitably lead to a significant increase in the number of rocket launches, which means an increase in environmental impact risk.

In addition, emissions are not the only problem with a rocket launch . While technology does not yet allow a full transition to a reusable rocket, there remains a high risk of an uncontrolled fall of the first stages to Earth, spills and fuel leaks during transportation, which inevitably destroys the environment.

And yet, despite all cons, the future of space exploration looks quite promising. Rapid technology development can no longer be stopped. In another 5-10 years, getting from London to Sydney by a rocket in half an hour or spending a vacation in orbit could become as commonplace as ordering a taxi or a hotel room today.

Emma joined the team in 2020 as an Editorial Assistant. She is currently on an internship with us while going through her further education. She is enthusiastic about Science and about Space in particular.

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NASA scientists consider the health risks of space travel

Humans aren't built to live in space, and being there can pose serious health risks . For space administrations like NASA, a major goal is to identify these risks to hopefully help lessen them. 

That was a major theme during NASA’s Spaceflight for Everybody Virtual Symposium in November, a virtual symposium dedicated to discussing current knowledge and research efforts around the impact of spaceflight on human health. During a panel discussion titled “Human Health Risks in the Development of Future Programs” on Nov. 9, NASA scientists discussed these risks and how they are using existing knowledge to plan future missions. 

Each panelist emphasized that the health risks presented by space travel are complex and multifaceted and that all types of risks should be considered closely when planning future missions. 

Related:  Space travel can seriously change your brain  

Five types of risk

When discussing the risks presented by living in space and space travel, there are five main types, the scientists outlined in the presentation. 

Two types of risk, radiation and altered gravity, come simply from being in space, they said. Research has shown that both can have major negative effects on the body, and even the brain . Others, like isolation and confinement as well as being in a hostile closed environment, encompass risks posed by the living situations that are necessary in space, including risks to both mental and physical health. 

Then, there are the risks presented simply by being a long way from Earth. The farther humans get from the Earth, the riskier living in space becomes in almost every way. 

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Everything from fresh food to unexpired medication will be extremely difficult to make accessible with longer journeys farther away. On the International Space Station, astronauts aren’t too far from us, and we can routinely send supplies to the crews in orbit. But a mission to the moon or Mars would pose more problems. 

Communication delays would increase, and there would likely be communication blackouts, said Sharmi Watkins, assistant director for exploration in NASA’s Human Health and Performance Directorate who served as a panelist for this discussion.   She said it would also take longer to get back to Earth if there was a medical emergency. 

"We're not going to measure it in hours, but rather in days, in the case of the moon, and potentially weeks or months, when we start to think about Mars," said Watkins.

Steve Platts, the chief scientist in NASA’s human research program, broke down different levels of risk in space and discussed how NASA uses a "phased approach" when it comes to research on human health. In this approach, initial "phases" include research on the health effects of being in space has also been done in simulated conditions on Earth, from isolation experiments in Antarctica to radiation exposure at Brookhaven National Laboratory in Long Island, New York. Likewise, experiments on the space station will help us to prepare for risk on the moon and Mars — these later phases build on knowledge gained from simulations. 

"We do work on Earth, we do work on low earth orbit and then we'll be doing lunar missions, all to help us get to Mars," Platts said. 

— Deep-space radiation could cause have big impacts on the brain, mouse experiment shows

— Without gravity, the fluid around an astronaut's brain moves in weird ways

— Long space missions can change astronaut brain structure and function

Still, no matter how much we may prepare on Earth, every space mission comes with risk, so NASA has set health standards to minimize this risk for astronauts. 

NASA has over 800 health standards that they’ve developed based on current research. These standards describe everything from how much space astronauts should have in a spacecraft to how much muscle and bone loss an astronaut can experience without being seriously harmed. These standards also include levels of physical fitness and health the astronauts need to meet before going into space. All of NASA’s health standards for astronauts are available online . 

A mission can impact astronauts’ health, but it also works the other way — health troubles with astronauts could impact a mission if they aren’t able to perform mission tasks adequately, said Mary Van Baalen, acting director of human system risk management at NASA and the panel’s moderator. She emphasized the complex interplay between these two types of impacts, both of which NASA scientists must keep in mind when planning missions. 

"Space travel is an inherently risky endeavor," she said. "And the nature of human risk is complex."

You can watch the full recording of the panel discussion and other talks from the symposium here . 

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Rebecca Sohn is a freelance science writer. She writes about a variety of science, health and environmental topics, and is particularly interested in how science impacts people's lives. She has been an intern at CalMatters and STAT, as well as a science fellow at Mashable. Rebecca, a native of the Boston area, studied English literature and minored in music at Skidmore College in Upstate New York and later studied science journalism at New York University. 

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What is space travel?

Space travel refers to human or robotic travel beyond Earth’s atmosphere into space. It includes missions to other planets, moons, asteroids, and beyond.

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How much does space travel cost?

Spaceflight has traditionally been a government-led activity — and it's never been cheap. But the stratospheric cost of putting people and payloads into space is finally starting to fall, thanks in part to the rise of SpaceX and other private spaceflight companies.

Here’s a look at what it costs to go to space, whether it’s another satellite that needs to be placed in orbit or an adventurous billionaire looking for a joyride around the moon .

Sending up a satellite

Using its 230-foot-tall Falcon 9, SpaceX charges $62 million to send into orbit commercial satellites weighing up to 50,000 pounds. The closest American competitor is the United Launch Alliance Atlas V, which starts at $73 million for a 41,000-pound payload .

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Those are just starting prices; government agencies typically pay more for a long list of extra services. The Air Force, for example, is paying SpaceX $96.5 million to launch a GPS satellite in 2019 .

Flying to the International Space Station

Since NASA mothballed its space shuttles in 2011, NASA has relied on the Russian Soyuz spacecraft to get astronauts to the ISS. Russia has been steadily raising the price of Soyuz seats, reaching $82 million each in 2015. The agency last purchased Soyuz seats for $75 million apiece in 2017.

NASA hopes to end its reliance on Russia in 2019, when SpaceX's Crew Dragon and Boeing's Starliner capsules begin “taxi” flights to the ISS. Seats on those spacecraft are expected to cost about $58 million .

How much would I have to pay for a flight into space?

Depending on where you're going, a ticket could set you back anywhere from $250,000 to tens of millions of dollars.

If you're looking simply to cross the 62-mile-high Karman line that marks the boundary between the upper atmosphere and outer space, Virgin Galactic says it will take you there for $250,000. The company says about 650 people already have tickets for the suborbital flights, to be made aboard a winged vehicle called SpaceShipTwo. A date for customer flights has yet to be announced.

Jeff Bezos’ rocket company, Blue Origin, plans something similar — sending space tourists on brief suborbital flights using its New Shepard rocket system. The company has yet to set ticket prices or say when paid flights might begin.

Virgin Galactic and Blue Origin passengers will join the fewer than a dozen private citizens who have funded their own trips into space. From 2001 to 2009, the Vienna, Virginia-based firm Space Adventures worked with Russia’s space agency to send eight people to the ISS on flights lasting 10 or more days.

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The world's first private astronaut, a wealthy American engineer named Dennis Tito, reportedly paid $20 million to spend eight days in space in 2001. More recently, Guy Laliberté, the co-founder of Cirque du Soleil, shelled out $35 million for an ISS trip in 2009 . Space Adventures still advertises Soyuz flights and plans to start booking trips to the ISS aboard Boeing’s Starliner.

In September 2018, SpaceX CEO Elon Musk announced that Japanese billionaire Yusaku Maezawa would ride the company’s yet-to-be-built Big Falcon Rocket on a trip around the moon. Neither Musk nor Maezawa, who said he would take along seven artists, would discuss the mission’s cost.

What about other rockets?

Small satellites may qualify for a free ride to space through NASA’s Educational Launch of Nanosatellites program, which helps universities and research groups fly standardized satellites called CubeSats aboard rockets as secondary payloads.

If your satellite can’t hitch a free ride, you can book a NASA sounding rocket to the edge of space for as little as $1 million . For orbital flights of payloads weighing less than 500 pounds, Los Angeles-based Rocket Lab offers launches of its Electron rocket from New Zealand for about $5 million .

From there, the price goes up steeply. Northrop Grumman's Pegasus rocket, which is air-launched from the belly of a jumbo jet, can place 1,000 pounds in orbit for about $40 million . Stratolaunch, a new venture bankrolled by Microsoft co-founder Paul Allen, plans to launch Pegasus rockets from its own colossal airplane before offering an expanded line of rockets capable of carrying up to 13,000 pounds. The company has yet to disclose prices.

NASA is developing its Space Launch System, which will carry astronauts to the moon and Mars. The rocket’s per-launch cost has not been disclosed, but the agency now spends at least $2 billion per year on the project. The maiden flight isn’t expected until 2020.

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NASA and Boeing’s Starliner delays expose the challenges of space travel

By Briley Lewis

Posted on May 22, 2024 10:00 AM EDT

6 minute read

NASA and Boeing have previously targeted a launch on May 25th, but the launch date has since been delayed once more, with the next opportunity to launch 'still being discussed.' NASA

Getting stuck in an airport for a flight delayed a few hours is bad, but two NASA astronauts currently have it much worse. At this point, their ride to the International Space Station aboard Boeing’s Starliner spacecraft has been delayed nearly three weeks. 

Starliner, one of two crewed spaceflight projects contracted by NASA from commercial companies, was originally scheduled for its first test flight with humans aboard on May 6th. But, issues with a faulty fuel valve and an unrelated helium leak led to mission management repeatedly nudging back the launch date. NASA and Boeing have previously targeted a launch on May 25th , but the launch date has since been delayed once more. The opportunity to launch was “still being discussed” on May 22, but as of May 23, it is now projected for June 1 . A successful flight would open the door for Starliner to become NASA’s second reliable launch vehicle in addition to SpaceX’s Dragon crew capsule, an important milestone in humanity’s return to crewed space exploration—that is, if Starliner can overcome its technical issues.

Although NASA did everything—from rocket launches to spacesuits and beyond—in-house during the space race of the 60s and 70s , they’ve worked closely with up-and-coming aerospace companies in the 21st century, creating a new paradigm for spaceflight known as the NASA Commercial Crew Program . 

In 2014, NASA contracted both Boeing and SpaceX to develop and deliver rockets and crew capsules to safely transport astronauts into low Earth orbit and beyond, investing over six billion dollars in this endeavor. For decades since the end of the Space Shuttle program, American astronauts have relied on international partners to get them where they need to go, such as with the Russian Soyuz capsule that frequently travels to the International Space Station (ISS). Enlisting both Boeing and SpaceX makes sure that NASA will have a way to get people to space without relying on international help, even if one of the companies’ systems fails or becomes unavailable for any reason.

“NASA’s Commercial Crew Program is working with the American aerospace industry to launch astronauts on American rockets and spacecraft from American soil to the International Space Station,” explains Leah Cheshier , public affairs officer at NASA’s Johnson Space Center . “The goal of the program is to provide safe, reliable, and cost-effective transportation to and from the orbiting laboratory [the ISS], which allows for additional research time and increases the opportunity for discovery aboard humanity’s testbed for exploration. This innovative approach also helps the agency maintain a human presence in low Earth orbit and enable exploration to the Moon in preparation for Mars for the benefit of humanity.”

Outsourcing some of the work to external agencies also frees up NASA to focus on its even more ambitious projects. “With the ability to purchase astronaut transportation from commercial companies as a service on a fixed-price contract, NASA can use resources to put the first woman, first person of color, and the first international partner on the Moon as a part of our Artemis missions in preparation for human missions to Mars,” adds Cheshier.

SpaceX’s Dragon already completed its test flights back in 2020 on the company’s Falcon rockets , making it the first commercial spacecraft to successfully complete such a feat, and it has been successfully carrying astronauts to and from the ISS since. Boeing’s Starliner, on the other hand, has faced some major challenges and setbacks. 

Both spacecraft are small habitats that sit atop a rocket (either the Falcon, or in Boeing’s case, the Atlas V from partner company ULA ), protecting astronauts from the forces and dangers of riding on a massive rocket to the unwelcoming environment of outer space. These capsules are both around the size of a hefty SUV, designed to hold up to seven astronauts maximum and dock with the ISS. They’re also equipped with parachutes to glide their passengers to a safe landing back on Earth.

Starliner completed its uncrewed test flights back in 2021 and 2022, albeit with some hiccups. The first uncrewed test in orbit around Earth experienced some software issues , preventing the capsule from reaching the ISS at all. Problems with small mechanical parts like valves plagued the project in 2021, and even its successful run through in 2022 revealed additional things that needed fixing.

With those bugs hopefully squashed, Starliner is now about to launch its first crewed test, featuring astronauts Barry “Butch” Wilmore and Sunita “Suni” Williams —both experienced navy pilots who have already taken some trips to the ISS and completed a collective 400-plus days in space. They’re planned to take a 24-hour ride to the station, stay aboard for a week to complete some additional tests on the capsule, and then return to Earth with a landing somewhere in the Western U.S. 

The goals of this test flight are basically to make sure everything works as expected: spacesuits, life support systems, thrusters, docking hardware, communications, astronaut seats and safety features, landing parachutes, you name it. They’ll also do a specific test aboard the ISS to prove the capsule could be used as a “safe haven” in the event of a catastrophe aboard the ISS (although the space station is a pretty darn safe place to be , at least if Earth’s not an option at the moment).

Unfortunately, all those goals are currently on pause as the mission team tries to iron out the remaining kinks. Starliner was first delayed due to a faulty valve on a liquid oxygen fuel tank , and then soon after that valve was replaced, delayed again due to a helium leak in another part of the craft. Just a few days ago, NASA announced in a press release that they “will take additional time to work through spacecraft closeout processes and flight rationale,” which “allows teams to further assess a small helium leak in the Boeing Starliner spacecraft’s service module.”

On the surface, it may seem strange that such a giant company, with years of research and development already poured into this project, would have so many complications. But, that leaves out one key piece of information: space travel is just really, really hard to do. Every system being created for this kind of exploration is nearly the first of its kind, and when human lives are on the line, we want to be as sure as possible that everything is perfect and going to plan before sending them on this dangerous journey. 

Compared to the tens of human spaceflight missions we’ve completed, there are billions of cars on Earth, tens of thousands of aircraft created by humans—and even with these well-tested, commonplace technologies, things often go wrong. We all know the experience of your car’s check engine light going off when you least expect it. Now imagine that light goes on when you’re days away from a mechanic, and you can’t leave your vehicle even if it catches on fire. That’s space travel.

As in the famous Kennedy speech from the Apollo days, we try to do things in space “not only because they are easy, but because they are hard.” The Atlas V rocket for NASA’s current hard-to-do thing is still on the launch pad, and Wilmore and Williams are ready to go when Starliner is ready. As with most NASA milestones, you can tune in to watch it yourself on NASA’s YouTube and other streaming channels . When this launch happens, it will be another momentous step in establishing our presence beyond our planet, paving the way for the first non-test flight of Starliner-1 in 2025 and Boeing’s certification as a reliable launch provider for NASA’s future endeavors to the ISS, the Moon and maybe even beyond.

Update May 22, 2024 11:00 AM: Another delay to the mission has been noted above.

Update May 23, 2024 8:13 AM: A new projected launch date has been noted above.

Latest in Space X

Spacex reveals new sleek spacesuits ahead of upcoming historic mission spacex reveals new sleek spacesuits ahead of upcoming historic mission.

By Andrew Paul

Crypto scammers flooded YouTube with sham SpaceX Starship livestreams Crypto scammers flooded YouTube with sham SpaceX Starship livestreams

A Groundbreaking Scientific Discovery Just Gave Humanity the Keys to Interstellar Travel

In a first, this warp drive actually obeys the laws of physics.

If a superluminal—meaning faster than the speed of light—warp drive like Alcubierre’s worked, it would revolutionize humanity’s endeavors across the universe , allowing us, perhaps, to reach Alpha Centauri, our closest star system, in days or weeks even though it’s four light years away.

However, the Alcubierre drive has a glaring problem: the force behind its operation, called “negative energy,” involves exotic particles—hypothetical matter that, as far as we know, doesn’t exist in our universe. Described only in mathematical terms, exotic particles act in unexpected ways, like having negative mass and working in opposition to gravity (in fact, it has “anti-gravity”). For the past 30 years, scientists have been publishing research that chips away at the inherent hurdles to light speed revealed in Alcubierre’s foundational 1994 article published in the peer-reviewed journal Classical and Quantum Gravity .

Now, researchers at the New York City-based think tank Applied Physics believe they’ve found a creative new approach to solving the warp drive’s fundamental roadblock. Along with colleagues from other institutions, the team envisioned a “positive energy” system that doesn’t violate the known laws of physics . It’s a game-changer, say two of the study’s authors: Gianni Martire, CEO of Applied Physics, and Jared Fuchs, Ph.D., a senior scientist there. Their work, also published in Classical and Quantum Gravity in late April, could be the first chapter in the manual for interstellar spaceflight.

POSITIVE ENERGY MAKES all the difference. Imagine you are an astronaut in space, pushing a tennis ball away from you. Instead of moving away, the ball pushes back, to the point that it would “take your hand off” if you applied enough pushing force, Martire tells Popular Mechanics . That’s a sign of negative energy, and, though the Alcubierre drive design requires it, there’s no way to harness it.

Instead, regular old positive energy is more feasible for constructing the “ warp bubble .” As its name suggests, it’s a spherical structure that surrounds and encloses space for a passenger ship using a shell of regular—but incredibly dense—matter. The bubble propels the spaceship using the powerful gravity of the shell, but without causing the passengers to feel any acceleration. “An elevator ride would be more eventful,” Martire says.

That’s because the density of the shell, as well as the pressure it exerts on the interior, is controlled carefully, Fuchs tells Popular Mechanics . Nothing can travel faster than the speed of light, according to the gravity-bound principles of Albert Einstein’s theory of general relativity . So the bubble is designed such that observers within their local spacetime environment—inside the bubble—experience normal movement in time. Simultaneously, the bubble itself compresses the spacetime in front of the ship and expands it behind the ship, ferrying itself and the contained craft incredibly fast. The walls of the bubble generate the necessary momentum, akin to the momentum of balls rolling, Fuchs explains. “It’s the movement of the matter in the walls that actually creates the effect for passengers on the inside.”

Building on its 2021 paper published in Classical and Quantum Gravity —which details the same researchers’ earlier work on physical warp drives—the team was able to model the complexity of the system using its own computational program, Warp Factory. This toolkit for modeling warp drive spacetimes allows researchers to evaluate Einstein’s field equations and compute the energy conditions required for various warp drive geometries. Anyone can download and use it for free . These experiments led to what Fuchs calls a mini model, the first general model of a positive-energy warp drive. Their past work also demonstrated that the amount of energy a warp bubble requires depends on the shape of the bubble; for example, the flatter the bubble in the direction of travel, the less energy it needs.

THIS LATEST ADVANCEMENT suggests fresh possibilities for studying warp travel design, Erik Lentz, Ph.D., tells Popular Mechanics . In his current position as a staff physicist at Pacific Northwest National Laboratory in Richland, Washington, Lentz contributes to research on dark matter detection and quantum information science research. His independent research in warp drive theory also aims to be grounded in conventional physics while reimagining the shape of warped space. The topic needs to overcome many practical hurdles, he says.

Controlling warp bubbles requires a great deal of coordination because they involve enormous amounts of matter and energy to keep the passengers safe and with a similar passage of time as the destination. “We could just as well engineer spacetime where time passes much differently inside [the passenger compartment] than outside. We could miss our appointment at Proxima Centauri if we aren’t careful,” Lentz says. “That is still a risk if we are traveling less than the speed of light.” Communication between people inside the bubble and outside could also become distorted as it passes through the curvature of warped space, he adds.

While Applied Physics’ current solution requires a warp drive that travels below the speed of light, the model still needs to plug in a mass equivalent to about two Jupiters. Otherwise, it will never achieve the gravitational force and momentum high enough to cause a meaningful warp effect. But no one knows what the source of this mass could be—not yet, at least. Some research suggests that if we could somehow harness dark matter , we could use it for light-speed travel, but Fuchs and Martire are doubtful, since it’s currently a big mystery (and an exotic particle).

Despite the many problems scientists still need to solve to build a working warp drive, the Applied Physics team claims its model should eventually get closer to light speed. And even if a feasible model remains below the speed of light, it’s a vast improvement over today’s technology. For example, traveling at even half the speed of light to Alpha Centauri would take nine years. In stark contrast, our fastest spacecraft, Voyager 1—currently traveling at 38,000 miles per hour—would take 75,000 years to reach our closest neighboring star system.

Of course, as you approach the actual speed of light, things get truly weird, according to the principles of Einstein’s special relativity . The mass of an object moving faster and faster would increase infinitely, eventually requiring an infinite amount of energy to maintain its speed.

“That’s the chief limitation and key challenge we have to overcome—how can we have all this matter in our [bubble], but not at such a scale that we can never even put it together?” Martire says. It’s possible the answer lies in condensed matter physics, he adds. This branch of physics deals particularly with the forces between atoms and electrons in matter. It has already proven fundamental to several of our current technologies, such as transistors, solid-state lasers, and magnetic storage media.

The other big issue is that current models allow a stable warp bubble, but only for a constant velocity. Scientists still need to figure out how to design an initial acceleration. On the other end of the journey, how will the ship slow down and stop? “It’s like trying to grasp the automobile for the first time,” Martire says. “We don’t have an engine just yet, but we see the light at the end of the tunnel.” Warp drive technology is at the stage of 1882 car technology, he says: when automobile travel was possible, but it still looked like a hard, hard problem.

The Applied Physics team believes future innovations in warp travel are inevitable. The general positive energy model is a first step. Besides, you don’t need to zoom at light speed to achieve distances that today are just a dream, Martire says. “Humanity is officially, mathematically, on an interstellar track.”

Before joining Popular Mechanics , Manasee Wagh worked as a newspaper reporter, a science journalist, a tech writer, and a computer engineer. She’s always looking for ways to combine the three greatest joys in her life: science, travel, and food.

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Slow warp —

New warp drive concept does twist space, doesn’t move us very fast, while it won't make a useful spaceship engine, it may tell us more about relativity..

Paul Sutter - May 23, 2024 12:55 pm UTC

A team of physicists has discovered that it’s possible to build a real, actual, physical warp drive and not break any known rules of physics. One caveat: the vessel doing the warping can’t exceed the speed of light, so you’re not going to get anywhere interesting any time soon. But this research still represents an important advance in our understanding of gravity.

Moving without motion

Einstein’s general theory of relativity is a toolkit for solving problems involving gravity that connects mass and energy with deformations in spacetime. In turn, those spacetime deformations instruct the mass and energy how to move. In almost all cases, physicists use the equations of relativity to figure out how a particular combination of objects will move. They have some physical scenario, like a planet orbiting a star or two black holes colliding, and they ask how those objects deform spacetime and what the subsequent evolution of the system should be.

But it’s also possible to run Einstein’s math in reverse by imagining some desired motion and asking what kind of spacetime deformation can make it possible. This is how the Mexican physicist Miguel Alcubierre discovered the physical basis for a warp drive—long a staple of the Star Trek franchise.

The goal of a warp drive is to get from A to B in the time between commercial breaks, which typically involves faster-than-light motion. But special relativity expressly forbids speeds faster than light. While this never bothered the writers of Star Trek , it did irritate Alcubierre. He discovered that it was possible to build a warp drive through a clever manipulation of spacetime, arranging it so that space in front of a vessel gets scrunched up and the space behind the vessel stretched out. This generates motion without, strictly speaking, movement.

It sounds like a contradiction, but that’s just one of the many wonderful aspects of general relativity. Alcubierre’s warp drive avoids violations of the speed-of-light limit because it never moves through space; instead space itself is manipulated to, in essence, bring the spacecraft’s destination closer to it.

While tantalizing, Alcubierre’s design has a fatal flaw. To provide the necessary distortions of spacetime, the spacecraft must contain some form of exotic matter, typically regarded as matter with negative mass. Negative mass has some conceptual problems that seem to defy our understanding of physics, like the possibility that if you kick a ball that weighs negative 5 kilograms, it will go flying backwards, violating conservation of momentum. Plus, nobody has ever seen any object with negative mass existing in the real Universe, ever.

These problems with negative mass have led physicists to propose various versions of “energy conditions” as supplements to general relativity. These aren’t baked into relativity itself, but add-ons needed because general relativity allows things like negative mass that don’t appear to exist in our Universe—these energy conditions keep them out of relativity’s equations. They’re scientists’ response to the unsettling fact that vanilla GR allows for things like superluminal motion, but the rest of the Universe doesn’t seem to agree.

Warp factor zero

The energy conditions aren’t experimentally or observationally proven, but they are statements that concord with all observations of the Universe, so most physicists take them rather seriously. And until recently, physicists have viewed those energy conditions as making it absolutely 100 percent clear that you can’t build a warp drive, even if you really wanted to.

But there is a way around it, discovered by an international team of physicists led by Jared Fuchs at the University of Alabama in Huntsville. (The team is also affiliated with the Applied Propulsion Laboratory of Applied Physics, a virtual think tank dedicated to the research of, among many other things, warp drives.) In a paper accepted for publication in the journal Classical and Quantum Gravity , the researchers dug deep into relativity to explore if any version of a warp drive could work.

The equations of general relativity are notoriously difficult to solve, especially in complex cases such as a warp drive. So the team turned to software algorithms; instead of trying to solve the equations by hand, they explored their solutions numerically and verified that they conformed to the energy conditions.

The team did not actually attempt to construct a propulsion device. Instead, they explored various solutions to general relativity that would allow travel from point to point without a vessel undergoing any acceleration or experiencing any overwhelming gravitational tidal forces within the vessel, much to the comfort of any imagined passengers. They then checked whether these solutions adhered to the energy conditions that prevent the use of exotic matter.

The researchers did indeed discover a warp drive solution: a method of manipulating space so that travelers can move without accelerating. There is no such thing as a free lunch, however, and the physicality of this warp drive does come with a major caveat: the vessel and passengers can never travel faster than light. Also disappointing: the fact that the researchers behind the new work don’t seem to bother with figuring out what configurations of matter would allow the warping to happen.

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Space communications: 7 things you need to know.

Katherine Schauer

1.     the basics, 2.     ground networks, 3.     space relays, 4.     bandwidth, 5.     data rates, 6.     latency, 7.     interference.

Movies and television shows can make communicating with space look easy. Astronauts on far off planets video chat with loved ones on Earth with crystal clear quality and no delay.

Do these imagined communications capabilities match reality? Not really.

Communicating to and from space is a challenging endeavor. Fortunately, NASA has the experience and expertise to get space data to the ground.

NASA’s Space Communications and Navigation (SCaN) program enables this data exchange, whether it’s with astronauts aboard the International Space Station , rovers on Mars , or the Artemis missions to the Moon.

Let’s look at some of the challenges of space communications alongside the technologies and capabilities NASA uses to overcome them.

At its simplest, space communications relies on two things: a transmitter and a receiver. A transmitter encodes a message onto electromagnetic waves through modulation, which changes properties of the wave to represent the data. These waves flow through space toward the receiver. The receiver collects the electromagnetic waves and demodulates them, decoding the sender’s message.

Consider a Wi-Fi router and networked devices around the home. Each device receives signals from the router, which transmits data from the internet. At its heart, the complex task of communicating with space resembles wireless communications in the home – only on an enormous scale and at incredible distances.

Communicating from space involves more than pointing a spacecraft’s antenna at the Earth. NASA has an extensive network of antennas around the globe — over all seven continents — to receive transmissions from spacecraft. Network engineers carefully plan communications between ground stations and missions, ensuring that antennas are ready to receive data as spacecraft pass overhead.

Ground station antennas range from the small very high frequency antennas that provide backup communications to the space station to a massive, 230-foot antenna that can communicate with far-off missions like the Voyager spacecraft , over 11 billion miles away.

In addition to direct-to-Earth communications, many NASA missions rely on relay satellites in order to get their data to the ground. For example, the space station communicates through Tracking and Data Relay Satellites (TDRS), which transmit data to ground stations in New Mexico and Guam. The recently launched Mars 2020 Perseverance rover will send data through orbiters around Mars, which forward the data to Earth.

Relays offer unique advantages in terms of communications availability. For example, the placement of TDRS at three different regions above Earth offers global coverage and near-continuous communications between low-Earth orbit missions and the ground. Rather than waiting to pass over a ground station, TDRS users can relay data 24 hours a day, seven days a week.

NASA encodes data on various bands of electromagnetic frequencies. These bandwidths — ranges of frequencies — have different capabilities. Higher bandwidths can carry more data per second, allowing spacecraft to downlink data more quickly.

Currently, NASA relies primarily on radio waves for communications, but the agency is developing ways to communicate with infrared lasers . This type of transmission — dubbed optical communications — will offer missions higher data rates than ever before.

NASA’s Laser Communications Relay Demonstration (LCRD) will showcase the benefits of optical communications. The mission will relay data between ground stations in California and Hawaii over optical links, testing their capabilities. NASA will also furnish the space station with an optical terminal that can relay data to the ground via LCRD.

Higher bandwidths can mean higher data rates for missions. Apollo radios sent grainy black and white video from the Moon. An upcoming optical terminal on the Artemis II mission will send 4K, ultra-high definition video from lunar orbit.

But bandwidth isn’t the only constraint on data rates. Other factors that can affect data rates include the distance between the transmitter and receiver, the size of the antennas or optical terminals they use, and the power available on either end. NASA communications engineers must balance these variables in order to maximize data rates.

Communications don’t occur instantaneously. They’re bound by a universal speed limit: the speed of light, about 186,000 miles per second. For spacecraft close to Earth, this time delay — or communications latency — is almost negligible.

However, farther from Earth, latency can become a challenge. At Mars’ closest approach — about 35 million miles away — the delay is about four minutes. When the planets are at their greatest distance — about 250 million miles away — the delay is around 24 minutes. This means that astronauts would need to wait between four and 24 minutes for their messages to reach mission control, and another four to 24 minutes to receive a response.

As NASA prepares to send humans to the Red Planet , communications engineers are developing ways for astronauts to stay connected with Earth while recognizing delays will be a part of the conversation.

As communications transmissions travel over long distances or through the atmosphere, the quality of their data can deteriorate, garbling the message. Radiation from other missions, the Sun, or other celestial bodies can also interfere with the quality of transmissions. To make sure that mission operations centers receive accurate data, NASA uses methods of error detection and correction. Methods of error correction include computer algorithms that interpret noisy transmissions as usable data.

While Hollywood dreams up stories that connect people across the galaxy with ease, NASA engineers endeavor to turn those dreams into reality. NASA is developing technologies and capabilities that address the real-world challenges of space communications, while empowering science and exploration missions with robust communications services.

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I'm a Packing Expert, and the 14 Travel Accessories That Help Me Double My Suitcase Space Are on Sale From $7

From packing cubes to tech organizers to my go-to handheld steamer.

Travel + Leisure / Jaclyn Mastropasqua

As a travel writer and the founder of packing site Just Packed , I’ve found that there’s only one way to minimize stress and maximize efficiency within the packing process: preparation. No matter the length of your trip, it’s always beneficial to take the time to think through what (and how) you’re packing. Sometimes, that means devising a list of your trip outfits a week before your departure. Other times, it’s ensuring your bathroom cabinets are well-stocked with travel-sized toiletries for easy grab-and-go packing the night before. 

With summer travel just days away — and can’t-miss Memorial Day sales already popping up online — now’s the perfect time to begin your packing game plan for the next few months. I recommend taking stock of the packing essentials you currently have (things like suitcases, packing cubes, and toiletry bags), and determining if there are any you may need to acquire or replace. And if you’re not sure which pieces to invest in for an overall easier time packing? I can help. 

Below, I combed through Amazon’s travel gear deals to find the best, highest-reviewed packing essentials, including a set of packing cubes and a durable, expandable suitcase. With these items in your travel arsenal, you’ll be completely ready to take advantage of any last-minute trips or weekend getaways this season — and you won’t have to spend a ton of money to do so. 

Hotor Packing Cubes

I’m a firm believer that every traveler can benefit from using packing cubes – whether they’re traveling with a carry-on or a checked bag. They’re ideal for keeping the contents of your suitcase organized, and I find they’re also useful for storing dirty clothes, damp bathing suits, or anything you’d rather keep separate from everything else. I usually suggest opting for sets of packing cubes that come with a variety of sizes, like this one from Hotor. For under $10, you get three packing cubes, a shoe bag, a drawstring pocket, and an underwear bag. 

Traveler's Choice Pagosa Carry-On Spinner

Suitcases can run the gamut in price, but you don’t have to spend a pretty penny for a high-quality, decent-sized piece of luggage. Case in point: The Traveler's Choice Pagosa Carry-On Spinner, which is currently on sale for under $70 (in certain colors). Armed with a scratch and water-resistant polypropylene hardshell, the bag comes with a built-in USB port, an interior power bank compartment, and 360-degree spinner wheels. It also has top and side rubber carry handles and an adjustable telescoping handle for greater maneuverability. Finally, all good carry-ons should have at least a couple of interior organization functions, and this one is designed with several zippered pockets and interior compression straps to keep your clothing secure. 

Vorspack Transparent Shoe Bags

Packing cubes usually steal the spotlight in the travel world, but don’t sleep on transparent (and affordable) shoe bags. Most travelers buy them to keep more delicate shoes from scuffing while in transit, but I also tend to use them to transport toiletries, socks, underwear, or other smaller-sized items. I might even pack an empty one or two — as they hardly take up any precious suitcase real estate — in case I have a need for an extra bag or organizational compartment during my trip.  

Iniu Portable Charger

There are some travel stresses that simply cannot be avoided (like delayed or canceled flights). Your phone battery dying because you can’t find a working outlet, however, does not need to be one of them. The night before I’m set to travel somewhere, I always make sure my portable charger is full of power and safely packed away in my bag. By buying a charger like this one from Iniu, I’ve never again had to experience the stress of arriving at my destination, only to realize I can’t call an Uber or access Google Maps until I find a plug to revive my phone battery. 

Raycon Everyday Bluetooth Wireless Earbuds 

For a long time, I swore by my large, noise-canceling headphones. While they’re comfortable and nearly impossible to lose, they take up a not-insignificant amount of room in my bag. To pack a bit lighter, I’ll switch out the bulky headphones for a pair of earbuds, like the Raycon Everyday Bluetooth Wireless Earbuds. On sale for 25 percent off, they’re the perfect alternative when you want to listen to your music or audiobook on the go, but you don’t have a ton of extra space. 

Kebnor Handheld Travel Steamer

The key to looking put-together while traveling is simple: You need a steamer. Forget the hotel iron (it takes too long to set up anyway), and leave the extra-large steamer at home. Instead, whip out the Kebnor Handheld Travel Steamer, currently marked down by 33 percent. In just 15 seconds, it will steam for eight minutes, allowing you to quickly freshen up your linen top or wrinkled pants. Plus, it’s small enough to easily slip into a personal item bag or a tiny space between your packing cubes. 

Tocelffe TSA Approved Silicone Travel Containers

Any traveler with a set beauty or skincare routine will know the struggle of packing your toiletries. Not all shampoos, conditions, moisturizers, and serums come in travel-sized containers, and you’ll frequently need to transport them in smaller containers when you’re only traveling with a carry-on bag — or risk airport security throwing them away. By having these Tocelffe TSA Approved Silicone Travel Containers on hand, you can use the funnel or spatula (both of which come with the set) to easily transfer your favorite products into either the silicone bottles, spray bottles, or cream jars. 

Bevegekos Cord Organizer Storage Case

Organization comes naturally to some travelers. For others, it’s a constant struggle, usually accented by unnecessary stress and worry. If you fall into the latter camp, you may benefit from the Bevegekos Cord Organizer Storage Case. Marked down to under $7, the travel pouch is designed to keep all of your electronic gadgets — like a power bank, charger cables, earbuds, and adapters — stored safely in one place. Gone are the days of digging through your backpack in a panic, searching for your charger or extra battery before your phone dies. 

Niveaya Hat Clip

If the beach, pool, or a generally strong sun will make an appearance in your travel plans this summer, you might be contemplating bringing along a sun hat. While important for sun protection, a wide-brimmed hat isn’t always the easiest accessory to pack — unless you use a magnetic hat clip. On sale for under $22, the Niveaya Hat Clip snaps onto your hat and then clips onto your tote bag or backpack, allowing for hands-free transportation. Thank me later.

Vorolo Crossbody Belt Bag

Whenever I’m flying, I’ll usually have an empty shoulder bag or belt bag tucked into my carry-on suitcase or personal item bag. That’s because while I like to have a smaller, on-the-go bag to use upon arrival, I also want to avoid an extra bag charge. The Vorolo Crossbody Belt Bag is the perfect example of this type of packable accessory. Not only is it functional (the nylon material is waterproof), but it’s sleek enough to wear with a variety of outfits and it can be worn as a crossbody bag, fanny pack, or an across-the-chest style. 

Travel Inspira Luggage Scale

A few years ago, I finally caved and bought a luggage scale — and I’ve never looked back. Prior to leaving for the airport, I’ll use it to measure the weight of my checked bag (instead of hoping for the best upon check-in). It’s also small enough to bring along on trips. That way, if you happen to pick up a few souvenirs, you can reweight the contents of your suitcase and adjust accordingly. I promise this will be the best $8 you’ve ever spent. 

Balulhg Travel Toiletry Bag 

A reliable, spacious toiletry bag is non-negotiable in my book, and I even have a few different shapes and sizes that I can alternate between on trips. One of my favorites is a hanging toiletry bag. It has enough room for all of my everyday products, and it’s designed so I don’t have to go digging through the bag to pull out a particular one. This style from Balulhg comes in two sizes, medium and large (as well as a variety of colorways), so you can pick whichever one makes the most sense based on how many products you typically travel with. 

Npcqun Compact Umbrella

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Molnia Travel Backpack

If you, like me, rarely travel without a laptop, it might be time to reevaluate how you’re transporting it from place to place. I try to always carry mine in a backpack, as it saves any undue pressure on my shoulders or arms. Marked down by 20 percent with an on-page coupon, this travel backpack can fit more than just a laptop, though. There’s plenty of space for clothes, a pair of shoes, a book, and even a small toiletry kit. And the best part? It’s still compact enough to fit under the airplane seat in front of you.

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By Katrina Miller May 29, 2024

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I just wrapped up a reporting fellowship at The Times, covering space, physics and the intersection of science and society. It’s a job that immerses me in all things science, so in my free time, I like to escape into other realms.

Here are five things I’ve been indulging in lately →

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This Pulitzer Prize-winning play by David Auburn is about the daughter of a mathematical genius and weaves together themes of family, gender, elitism and the fine line between intelligence and insanity. I caught a production by Bluebird Arts, a Chicago theater company, and found it poignant and profound.

Find tickets here.

This might just be the best book on productivity I’ve ever read. Oliver Burkeman argues that efficiency is a trap, and because our life spans are only, on average, 4,000 weeks, we should embrace the fact that we will never get everything done. Only then can we cut out the noise and enjoy what really matters.

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