But Isaacman—now a SpaceX “frequent flier” after also taking part in 2021’s Inspiration4 mission, the first all-civilian spaceflight—is just getting started.

“If we actually believe in the future that SpaceX is trying to create—where tens of thousands of people can be in space, on the moon, walking around on Mars—these kinds of capabilities have to exist within commercial industry,” Isaacman told FLYING at the 2024 UP.Summit.

Polaris Dawn was the first of three missions under Isaacman’s Polaris Program. The final mission, which does not yet have a target date, is expected to be the first crewed flight of SpaceX’s Starship: the most powerful rocket ever built and the vehicle CEO Elon Musk believes will help humans colonize Mars.

Isaacman and crewmates Sarah Gillis and Anna Menon, the first SpaceX employees to actually fly to space, sat down with FLYING for a mission debrief to highlight their favorite moments from Polaris Dawn—and talk about what comes next.

No Days Off

From the moment they lifted off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida, secured in a SpaceX Dragon capsule strapped to a Falcon 9 rocket, the Polaris Dawn crew got to work.

On the first day of the mission, for example, the crew reached an orbital apogee of 870 miles—three times higher than the International Space Station and the farthest humans have traveled from Earth since the Apollo era. Gillis and Menon now share the record for the furthest distance traveled from Earth by a woman.

At that altitude, the crew passed through the Van Allen radiation belts, a treacherous environment for humans. It conducted research that will help scientists better understand how to protect astronauts flying through that region.

“There’s micrometeoroid and debris that’s out there. A little millimeter piece of aluminum traveling at 8 kilometers a second will shred just about everything,” Isaacman said during a panel discussion at UP.Summit. “It’s a scary prospect. But we’ve got to travel through that if we’re going to get to the moon and Mars.”

Isaacman’s favorite moment of the mission, however, was the spacewalk he and Gillis performed. It was the first time civilian astronauts ventured outside a spacecraft. And because the Dragon capsule lacks an airlock, it was also the first time four astronauts were simultaneously exposed to the vacuum of space.

“That moment when Jared opened the hatch and there was the black beauty of space outside the hatch was a moment full of sensation, full of the awe that that evoked, as well as a cold rushing over your body,” Menon said. “It’s a full body experience.”

Traveling at 17,500 mph at an orbital altitude north of 450 miles, the astronauts were protected by SpaceX’s extravehicular activity (EVA) spacesuits, which were specially designed for Polaris Dawn. The goal of the spacewalk was to perform mobility testing on the suits—a relatively simple objective compared to previous EVAs.

“The difference is—and this is so important—is all of those had the entire weight and resources of world superpowers behind them,” Isaacman said.

NASA’s budget peaked in the 1960s, when it was about 4.5 percent of the U.S. gross domestic product (GDP).

For Gillis, a classically trained violinist, the highlight was her on-orbit performance of “Rey’s Theme” from the Star Wars franchise. Incredibly, Gillis said she had no prior practice playing in microgravity, where pushing on the violin’s fingerboard can move the entire instrument. She used a quarter-sized bow for greater control.

“It was three crewmembers in front of me with this tangle of cables, and the chaos of them trying to get the right angle as they’re floating away, and I’m floating away,” Gillis said. “It was just this total joy to try and record that.”

The performance, organized in partnership with St. Jude Children’s Research Hospital and El Sistema USA, was a charitable effort to raise awareness and funding for cancer research and access to music education. But it was also a demonstration of SpaceX’s Starlink communications system. A Starlink module on Dragon used a beam of light to transmit the footage to another satellite while both were moving at orbital speeds.

How They Did It

Polaris Dawn was a private astronaut mission, meaning SpaceX was responsible for preparing the crew. Scott “Kidd” Poteet, the fourth crewmember and a retired U.S. Air Force fighter pilot of two decades, said the training was more intense than anything he has ever experienced.

Gillis, a SpaceX astronaut trainer, said that while the crewmembers brought plenty of experience, combining their strengths was a learning curve. Early on, for example, they struggled through teamwork exercises in a simulator.

“We might have all of this expertise across the four of us, but we utterly failed that sim,” Gillis said. “Just because you have your own expertise doesn’t mean you are yet able to work in a team well.”

Added Menon: “It is really, really neat to see how the team develops together, how they learn to work together, and how they prepare for a mission. And it was really confidence inspiring, and really, to me, a very beautiful part of the development process getting us to launch.”

Isaacman said the training for Polaris Dawn was as special as the mission itself. The astronauts’ preparations took them scuba diving and skydiving, into the cockpit of fighter jets, and even to the top of Mount Cotopaxi in Ecuador. Each day was a new adventure.

“You came in one day and this development suit had a handful of different rotators or joints in it that we were testing out,” Isaacman said, “and then we come back the next week and it would be entirely different.”

In just two and a half years, SpaceX trained the crew, modified Dragon, and developed the EVA suits for Polaris Dawn. To put that into perspective, Menon’s husband, Anil Menon, was selected by NASA for an astronaut mission four days before Menon was picked by SpaceX—but she flew first.

Why It Matters

The technology and capabilities demonstrated during Polaris Dawn could alter human spaceflight as we know it.

The spacewalk, for example, was more than a flashy achievement. NASA’s current EVA spacesuits were designed four decades ago, and suit maintenance has forced the agency to postpone several spacewalks in recent months. Earlier this year, NASA and Collins Aerospace “mutually agreed” to end a $100 million contract that would see Collins deliver new suits by 2026.

NASA could spend billions of dollars on a suit redesign. SpaceX’s EVA suit, meanwhile, is designed to be manufactured at scale for thousands of people to build and explore on Mars, Isaacman said. The suit was designed for Polaris Dawn specifically, “but just like a lot of things that SpaceX works on, the utility is quite broad,” he said, implying that other astronauts will one day wear it.

The Starlink communications system showcased during the mission, meanwhile, could be a tool to ease demand on NASA’s Deep Space Network: an array of giant radio antennas that supports communications in the final frontier.

“We’re even hearing now, just even alleviating the demand over the [U.S. Tracking and Data Relay Satellite System] and ground stations…as being a potential communication path to lunar missions, or potentially even Mars,” Isaacman said.

The altitude record, spacewalk, and symphony performance grabbed most of the Polaris Dawn headlines. But in between those objectives, the crew conducted an array of experiments to study the health of astronauts on long-duration spaceflight.

“There’s a lot of problems we have to solve if we’re going to have thousands of people living and working in space for really long periods of time and going really far from Earth,” said Menon.

For example, crewmembers stuck a device called an endoscope down their noses to image their airways, the first time that has been accomplished in space. They also researched spaceflight associated neuro ocular syndrome (SANS), a condition developed in microgravity that can impair astronauts’ vision. Other experiments focused on motion sickness, which according to Menon affects about 6 in 10 people when they first reach space.

“If you have 100 people in a spacecraft going up at the same time, and 60 of them are vomiting, that’s a big problem,” she said.

Data from these experiments will be entered into a database that is accessible to the wider space community, allowing non-SpaceX researchers to learn for years to come.

“If we want to have a future among the stars, if we want to have many people living and working there, we need these solutions,” Gillis said. “We need a new communication system. We need EVA suits so people can actually go and explore the surface of Mars. We need to understand the health implications so by the time we get there, they haven’t lost their vision and they aren’t sick.”

The crew also spent plenty of time studying problems back on Earth.

Isaacman’s Inspiration4 crewmate, St. Jude physician assistant Hayley Arceneaux, became the first human to fly to space with a prosthesis after recovering from childhood bone cancer. That mission raised more than a quarter of a billion dollars for the charity, which signed on as a partner for Polaris Dawn.

“You’ll continue to see [St. Jude] play a huge part in all of our missions until their work is done,” Isaacman said.

The astronauts traveled the world visiting hospitals and meeting children, medical professionals, and researchers who helped inform some of their experiments. They installed Starlink connections at many facilities, providing access to the Internet and education. The work was part of St. Jude’s effort to create cancer treatment programs, educate oncologists, and provide access to safe chemotherapy treatment worldwide.

“Right now, depending on where you’re born, you either have an 80 percent chance of survival, or you have a 20 percent chance if you’re not born in the U.S.,” Gillis said. “So [St. Jude has] pioneered extraordinary outcomes for children. But if you aren’t born here, you don’t benefit from that.”

One of the mission’s most special moments was Menon’s on-orbit reading of a children’s book she authored, Kisses from Space, to her two children and St. Jude patients. Proceeds from the book will go to St. Jude, and the charity will auction off the copy that traveled to space.

“It was ultimately the story of the power of love to overcome any distance, and I think, hopefully, sharing space but also sharing human connection and the power of that through this space story,” Menon said. “Reaching kids around the world was a powerful moment.”

What’s Next?

Isaacman said the Polaris Dawn crew still has a few weeks of debriefing, and he has yet to fully turn his sights to the next Polaris mission.

“We are still very on-mission,” he said. “We really need to understand everything we got right and could have done better on this one, things we got wrong and certainly could improve upon, before you even get to what’s in the realm of possibility for Mission Two.”

Isaacman couldn’t say much about the next mission. But some time next year, he said, the Polaris team will come together to determine what they can pull off.

For example, SpaceX could improve its EVA suit with added mobility, a portable life support system, or increased pressure, which would eliminate the “prebreathe” process Polaris astronauts used to remove nitrogen from their bodies before the EVA. Chances are the next mission will feature another spacewalk.

“It would be such a travesty if [SpaceX] didn’t take what they learned and take another giant leap in a good direction,” Isaacman said. “So I would fully expect EVAs are on the horizon for the next go.”

Mission Two will set the stage for the final Polaris mission, which is expected to be the debut crewed flight of SpaceX’s Starship. Both Starship and the Super Heavy booster are designed to be fully reusable, and SpaceX plans to fly them hundreds of times before adding crew. Musk in September said the company could launch uncrewed Starships to Mars within two years.

If SpaceX can successfully validate Starship, it could usher in a new era of civilian spaceflight. Gillis and Menon, for example, were the first two SpaceX employees to reach the final frontier, but they may not be the last.

“If you have a propulsion engineer, you have the interior engineer, the suit engineer on that spaceship, it makes a lot of sense to bring the expertise with you when you’re going to Mars,” Menon said. “I don’t think I ever thought it would happen this soon—and I definitely didn’t think it would be me.”

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The post Polaris Dawn Crew Talks Mission Highlights, Next Steps appeared first on FLYING Magazine.

The firm is preparing for the Crew-9 astronaut rotation mission to the International Space Station (ISS), which will culminate in the long-awaited return of astronauts Butch Wilmore and Suni Williams in February. Wilmore and Williams hitched a ride to the ISS on Boeing’s Starliner in June and have remained there as engineers contended with several issues on the spacecraft.

Crew-9 will be the first human spaceflight to launch from Space Launch Complex-40. Initially scheduled to fly in August, the mission was pushed back to give NASA and Boeing more time to analyze and eventually undock Starliner, freeing up space for Dragon to dock.

The flight is NASA’s ninth Commercial Crew mission with SpaceX, the agency’s sole active contractor for that program. Boeing, the other contract recipient, is still developing Starliner but hopes to fly an inaugural astronaut rotation mission late next year. The program seeks to maintain a continuous human presence on the ISS, which in 2025 will enter its 24th consecutive year of occupation.

Crew-9 was originally slated to be a four-person mission. But only NASA astronaut Nick Hague and Roscosmos cosmonaut Aleksandr Gorbunov will fly up to the space station, meaning Dragon will launch with a pair of empty seats. NASA astronauts Zena Cardman and Stephanie Wilson were taken off the flight to make way for Williams and Wilmore but are eligible for reassignment.

Hague was chosen due to his experience. Gorbunov, who has never flown to space, remains on the manifest because NASA is required to send a Roscosmos cosmonaut on the mission.

After liftoff, Dragon will accelerate to 17,500 mph before docking autonomously with the space station. Upon arrival, they will join the crew of ISS Expedition 72, which includes Wilmore, Williams, NASA astronaut Don Pettit, and Roscosmos cosmonauts Alexey Ovchinin and Ivan Vagner.

Over the course of about five months, the crew will perform station maintenance via spacewalk and conduct more than 200 scientific research experiments, intended to prepare humans for exploration beyond low-Earth orbit as well as solve problems back on Earth. Among other things, they will study the physics of supernova explosions, the behavior of cells and platelets during long-duration spaceflight, and methods to reduce changes to astronaut brain and ocular structure due to low gravity.

NASA will provide live streaming coverage of the Crew-9 prelaunch, launch, postlaunch, and docking on NASA+ and the agency’s website, starting Friday afternoon. It will also maintain a live video feed of the launchpad in the hours leading up to liftoff and provide blog updates. Spaceflight enthusiasts can register to attend the launch virtually.

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The post What to Watch: SpaceX Crew-9 Scheduled for Saturday Launch appeared first on FLYING Magazine.

Commander Jared Isaacman, the billionaire CEO of Shift4 Payments who purchased the five-day orbital flight from SpaceX, and mission specialist Sarah Gillis, one of two SpaceX engineers who are the company’s first employees to fly to space, exited SpaceX’s Dragon capsule one at a time, each spending about 12 minutes outside. The astronauts were traveling at 17,500 mph at an altitude more than 450 miles above Earth, higher than the International Space Station.

But there’s a catch. Because Dragon does not have an airlock, all four crewmembers were exposed to the vacuum of space. The mission profile added risk compared to a typical spacewalk, where astronauts enter and exit through a vacuum-sealed chamber.

“Today’s EVA was the first time four humans were exposed to the vacuum of space while completing the first-ever commercial astronaut spacewalk from a commercially-produced spacecraft in commercially-produced extravehicular activity [EVA] suits,” said Stu Keech, vice president of Dragon engineering at SpaceX.

SpaceX provided live stream coverage of the full, approximately two-hour process, which can be rewatched here.

The Falcon 9 rocket carrying Dragon and the Polaris Dawn crew lifted off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida early Tuesday morning. Almost immediately, the astronauts began preparing for the spacewalk.

The first step was a “prebreathe” to remove nitrogen bubbles that can form within body tissues, causing decompression sickness. During the approximately two-day process, the cabin’s pressure was lowered and oxygen levels were raised gradually to help the crew acclimate.

After that, the astronauts donned their EVA spacesuits, which are designed to be worn both inside and outside the spacecraft. Developed by SpaceX with help from Isaacman’s Polaris team, the suits have endured hundreds of hours of testing and feature greater mobility, durability, and even a high-tech heads-up display (HUD).

“Building a base on the moon and a city on Mars will require thousands of spacesuits,” SpaceX said in a post on X. “The development of this suit, and the EVA performed on this mission, will be important steps toward a scalable design for spacesuits on future long-duration missions.”

After completing suit leak checks and venting Dragon down to vacuum, Isaacman opened the hatch and was first to egress. Remaining attached to the spacecraft, he used a specially designed structure called Skywalker to move around and perform tests on the suit’s thermal and mobility systems. Skywalker is equipped with several cameras that were used to capture the moment in real time.

“SpaceX, back at home we all have a lot of work to do,” Isaacman said as he looked down on the planet below, “but from here, Earth sure looks like a perfect world.”

After Isaacman returned, it was Gillis’ turn. The SpaceX engineer stepped out and performed the same series of tests, while mission pilot Scott “Kidd” Poteet and mission specialist and medical officer Anna Menon monitored her support systems.

Finally, the hatch was closed, Dragon was repressurized, and the astronauts removed their suits.

“Dragon uses pure nitrogen during ‘repress,’ which mixes with the pure oxygen being released into the cabin via the open loop system that keeps the EVA suits pressurized,” SpaceX said. “This process is unique to Dragon which acts as its own airlock.”

From venting to repressurization, the entire process took about one hour and 45 minutes.

SpaceX CEO Elon Musk was quick to praise the crew for its historic achievement, as was NASA administrator Bill Nelson.

“Congratulations @PolarisProgram and @SpaceX on the first commercial spacewalk in history!” Nelson posted on X. “Today’s success represents a giant leap forward for the commercial space industry and @NASA’s long-term goal to build a vibrant U.S. space economy.”

Polaris Dawn, the first of three missions Isaacman purchased for SpaceX under the Polaris program, has so far lived up to its lofty expectations. In addition to the spacewalk, the astronauts on day two of the mission ascended to an orbital height not reached by humans since the Apollo 17 astronauts in 1972, passing through hazardous radiation belts. 

Menon also read a children’s book she authored, Kisses from Space, for her family and patients of St. Jude Children’s Research Hospital, live from orbit. While the Polaris missions are scientific—Polaris Dawn alone will conduct nearly 40 experiments—they are also billed as charitable endeavors to raise money for St. Jude.

Ultimately, the Polaris program may have a ripple effect on NASA’s efforts to return Americans to the moon via the Artemis program.

Polaris Mission III is expected to be the debut crewed flight of SpaceX’s Starship, the largest and most powerful rocket ever built. The space agency has asked the company to develop a lunar lander variant of Starship to land astronauts on the moon’s south pole, which will be used during Artemis III scheduled for September 2026.

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This comes after a weeklong mission to the ISS extended into an eight-month nightmare for two astronauts after the Starliner experienced thruster malfunctions during the trip to space. Since their blastoff on June 5, NASA astronauts Barry “Butch” Wilmore and Sunita “Suni” Williams have been staying on the ISS alongside the Expedition 71 crew.

• READ MORE: NASA Explains Strange Noises Heard on Boeing Starliner

NASA announced in August that the crew would be returning via the SpaceX Dragon spacecraft in February. They won’t be the first astronauts returning to Earth in a separate spacecraft than the one they launched from, though missions extended from unforeseen factors are rare. 

Returning the Starliner

NASA’s mission timeline posted on Thursday states that safety and mission success remains top priorities for teams during the Starliner’s return.

As the first American capsule designed to touch down on land, the Starliner will use potential landing locations in the White Sands Missile Range, New Mexico; Willcox, Arizona; and Dugway Proving Ground, Utah. NASA said that Edwards Air Force Base in California is also available as a contingency landing site.

NASA said it analyzes weather predictions for the various landing sites, taking note of winds, ground temperatures, cloud ceiling height, visibility, precipitation, and nearby storms. When the teams start undocking, the Starliner will complete several departure burns. From there, the spacecraft is planned to reach its landing site in as little as six hours.

During this deorbit burn, a final weather check will commence.

• READ MORE: SpaceX—Not Boeing—Will Return Starliner Astronauts After Monthslong Mission

“Winds must be at or below 10 mph (9 knots),” NASA’s mission timeline said. “If winds exceed these limits, teams will waive the deorbit burn, and Starliner will target another landing attempt between 24 and 31 hours later.”

Assuming weather meets acceptable conditions, Starliner will execute its deorbit burn for approximately 60 seconds. This will slow it down enough to reenter earth’s atmosphere and land at its target site. Immediately after the deorbit burn, the spacecraft will reposition for service module disposal, which will burn up during reentry over the southern Pacific Ocean.

Reentry will see the capsule reach temperatures of up to 3,000 degrees Fahrenheit, which may interrupt communications with the spacecraft for approximately four minutes. After this, the forward heat shield on top of the aircraft will be jettisoned and several parachutes will be deployed at 30,000 feet.

• READ MORE: NASA: Starliner Astronauts May Not Return Until February

As the aircraft continues to slow down, the base heat shield will jettison at 3,000 feet and cause six landing bags to inflate. The spacecraft will travel at approximately 4 mph at touchdown.

Recovery After Landing

After touchdown, several NASA and Boeing landing recovery teams stationed near Starliner’s landing site will move toward the spacecraft in sequential order:

• The gold team will use equipment to “sniff” the capsule for any hypergolic fuels that didn’t fully burn off before re-entry. They also cover the spacecraft’s thrusters.

• The silver team will then electrically ground and stabilize the Starliner.
• The green team will supply power and cooling to the crew module since the spacecraft will be powered down.
• The blue team will then document the recovery for public dissemination and future process review.
• The red team, which includes Boeing fire rescue, emergency medical technicians, and human factors engineers, then will open the Starliner hatch.

The teams will begin unloading time-critical cargo from the Starliner. The spacecraft will then be moved to Boeing facilities at NASA’s Kennedy Space Center in Florida for refurbishment.

The post NASA Reveals Mission Timeline for Crewless Starliner Return appeared first on FLYING Magazine.

The jets are owned by billionaire entrepreneur and Polaris Dawn commander Jared Isaacman, who purchased the five-day orbital mission and two other private astronaut flights from SpaceX in 2022. Among other feats, Polaris Dawn will ascend to orbital heights not reached since the Apollo 17 astronauts in 1972 and feature the first attempt at a commercial spacewalk.

“The idea is to develop and test new technology and operations in furtherance of SpaceX’s bold vision to enable humankind to journey among the stars,” Isaacman said during a mission overview briefing on Monday.

But with those feats comes a degree of risk. At their apex, the astronauts will travel through a portion of the hazardous Van Allen radiation belts. And because the Dragon spacecraft that will carry the crew has no airlock, all four astronauts will be exposed to the vacuum of space during the historic spacewalk.

Polaris Dawn is scheduled to launch no earlier than 3:38 a.m. EDT on Monday within a four-hour window from KSC’s Launch Complex 39-A. Earlier this week, the Dragon capsule was transported to the pad, where teams are mating it with a Falcon 9 booster that will make its fourth flight.

Joining Isaacman will be mission pilot Scott “Kidd” Poteet, a longtime friend and coworker of the Shift4 Payments CEO. Poteet served as mission director for Inspiration4, a 2021 orbital mission—also purchased from SpaceX by Isaacman—that featured the first all-civilian crew.

Accompanying them will be the first SpaceX employees to actually fly to space—mission specialists Sarah Gillis and Anna Menon. Gillis, a SpaceX engineer and astronaut trainer, has prepared several NASA crews that have reached the final frontier and was Isaacman’s instructor for Inspiration4. Menon, the company’s lead space operations engineer, will also serve as Polaris Dawn’s medical officer.

This week, crewmembers will conduct a refresher on the mission’s nearly 40 planned experiments, dry dress rehearsal, and launch readiness review. They will spend a maximum of five days orbiting the Earth before splashing down at one of seven locations off the coast of Florida.

Great Heights

Polaris Dawn will waste no time achieving its objectives, beginning with a historic climb on day one.

Hitching a ride on Falcon 9, Dragon will reach space in about 10 minutes and within hours will begin to pass through the inner regions of the Van Allen Belts—a treacherous zone where the risk of damage from radiation is high.

“The Earth’s magnetosphere traps the high energy radiation particles and shields the Earth from the solar storms and the constantly streaming solar wind that can damage technology as well as people living on Earth,” according to NASA. “These trapped particles form two belts of radiation, known as the Van Allen Belts, that surround the Earth like enormous donuts.”

Dragon will ascend to an oval orbit with an apogee of 870 miles, more than three times higher than the International Space Station. It would be the highest orbital altitude reached by humans in half a century.

“Generally speaking, vehicles don’t like radiation, so that’s why we’re going to stay there for the shortest amount of time that’s necessary to gather the data we want,” said Isaacman.

In that time, however, the crew will perform plenty of experiments, leveraging the unique high-radiation environment to potentially learn from it. The Polaris program and SpaceX have partnered with more than 30 institutions around the world to perform the research, which will focus largely on human health.

“We are born into 1G,” said Menon. “When you go into 0G, whether it’s for five days or a nine-month trip to Mars, things change. You have bone density loss, you have vision changes, you have severe motion sickness, and we don’t have answers for all of that.”

To search for them, the astronauts will don special contact lenses that measure the pressure inside of their eyes and will test ways to reduce the disorientation experienced when returning to Earth, for example.

Research will continue throughout the mission. On the fourth day, the crew will test out a specially designed communication system in Dragon’s trunk, which will use laser beams to communicate with SpaceX Starlink satellites as they zip through space. According to Gillis, the demonstration will be livestreamed and worth tuning into, though she did not get into specifics.

Polaris Dawn is also a charitable endeavor, aiming to raise money for St. Jude Children’s Research Hospital. Menon, for example, will debut a children’s book she wrote, the proceeds for which will go to cancer research, during day two of the flight. The SpaceX engineer said the company has installed Starlink terminals at hospitals nationwide to support remote medicine capabilities.

And in a fundraising partnership with Doritos, Polaris Dawn’s cargo will include a container of chips. According to its website, the initiative has raised $500,000. But there won’t be any sticky fingers—the classic Doritos “dust” has been replaced by a special oil-based coating designed to retain flavor.

Isaacman on Monday said Polaris Dawn has already raised “millions” for St. Jude and that he plans to continue the partnership for the Polaris II and Polaris III missions. Inspiration4 raised more than a quarter of a billion for the charity.

Suit Up

Reaching the Van Allen Belts would be a huge feat. But that’s arguably the second-most important—and risky—mission objective.

On the third day of the flight, two of the astronauts will don specially designed SpaceX extravehicular activity (EVA) spacesuits and exit Dragon. They will remain attached to the spacecraft—at one point by just their feet—using mobility aids to maneuver around. The vehicle will be oriented to shield the crew from direct sunlight.

The entire process, from venting to repressurization, will take about two hours and will be livestreamed. Each astronaut will spend 15 to 20 minutes outside the capsule.

“It will look like we’re doing a little bit of a dance,” said Isaacman, “…[but] we’re going through a test matrix on the suit. And the idea is to learn as much as we possibly can about this suit and get it back to the engineers to inform future suit design evolutions.”

But there’s a catch: Dragon does not have an airlock, which means all four crewmembers will be exposed to the vacuum of space.

To remedy this, they will perform a process known as “pre-breathing” beginning just one hour after reaching orbit. The procedure will acclimate the astronauts to a low-pressure environment by gradually reducing the pressure inside the capsule. According to Menon, the idea is to “slowly pull nitrogen out of our body and reduce our risk of decompression sickness.”

On the day of the spacewalk, their spacesuits will be pressurized with 100 percent oxygen for a final pre-breathe. The entire process will take about 45 hours.

Per Isaacman, the spacewalk portion of Polaris Dawn took up the bulk of mission planning, in part due to the development of SpaceX’s EVA suits.

The suits are an evolution of the company’s current apparel, which is designed to be worn only inside Dragon. The upgraded digs feature added mobility and materials pulled from Falcon 9’s trunk and interstage. A 3D-printed helmet includes a heads-up display, which shows spacesuit pressure, temperature, and humidity, as well as a clock to track the astronauts’ time in the void. The suit’s temperature can even be controlled using a dial.

“You might think that we would be extremely cold out in the vacuum of space, and actually we’re more concerned about being too warm,” said Menon.

The suits have undergone an “incredibly expensive testing campaign” with the crew, which has spent about 100 hours wearing them. Because the hardware is “constantly evolving,” per Menon, it could not be tested in a pool. Instead, the astronauts used special harnesses to simulate weightlessness and wore heavy down suits—the kind you’d need at the top of Mount Everest—over their EVA suits.

“We’re really trying to create an environment that doesn’t have convection, looking at thermals, looking at what we’ll actually experience in these suits,” said Menon. “We’ve covered everything from lifecycle testing, pressure testing, [micrometeoroid and orbital debris] testing, extreme hot and cold testing, [and] an entire campaign on [electrostatic discharge] and flammability testing.”

That level of rigor extended to the Dragon capsule, which itself required a few key modifications for the mission. SpaceX added a nitrogen repressurization system, for example, and made upgrades to the spacecraft’s environmental sensors and life support system.

“This includes adding a lot more oxygen to the spacecraft so we can feed oxygen to four suits through umbilicals for the full duration of the spacewalk,” said Menon.

Outside Dragon’s hatch, engineers installed what SpaceX calls the Skywalker, a structure that will help the astronauts find their footing in zero gravity. Atop the Skywalker is a new camera that will capture footage of the spacewalk. Handholds and footholds were added to the capsule’s interior.

In addition, all of that hardware has been “baked out” in a thermal vacuum chamber, Menon said, to burn off chemicals that could produce toxic gas when the capsule is vented.

Thousands of Hours

The astronauts have already prepared extensively for the spacewalk. They recently walked through the entire prebreathe process and venting and repressurization sequence, for example, inside the vacuum chamber at Johnson Space Center.

But that was only the tip of the iceberg.

“I can tell you without a doubt this has been some of the most challenging training that I’ve ever experienced, and I could not imagine a more qualified crew than these three individuals,” said Poteet, a retired U.S. Air Force fighter pilot and member of the Thunderbirds.

The astronauts performed zero-gravity flights in the vacuum chamber, trained in a centrifuge to experience g-forces, and spent time in an altitude chamber to get familiar with symptoms of hypoxia—a condition caused by low oxygen levels in the body. The crew also used a pressure chamber to practice many of the experiments they will conduct in space back on Earth. Gillis and Menon underwent medical training at partner hospitals to be qualified to care for the team.

Each crewmember also spent about 2,000 hours in a simulator, poring over spacecraft and system manuals, communication methods, crew resource management, and contingency scenarios.

“To put this into perspective, I flew fighters for 20 years—I accomplished about 1,500 hours in the simulator training for combat,” said Poteet.

Another key component of training was, as Poteet put it, “getting comfortable in uncomfortable scenarios.” Over the past few years, the crew has gone scuba diving and skydiving, flown fighter jets, and even summited Cotopaxi in Ecuador, a nearly 20,000-foot peak.

“When it’s a multiday journey to get to the summit, you’re dehydrated, you’re hungry, you’re grouchy…it sucks,” said Poteet. “And you learn a lot about yourself under this stressful environment, and you learn a lot about each other.”

‘The 737 for Human Spaceflight’

Though it was purchased by an outside stakeholder, Polaris Dawn has some major implications for SpaceX.

For one, it will be the company’s first mission with crew since Falcon 9 was grounded by the FAA in July. The rocket was quickly cleared for a return to action and has since completed several Starlink launches.

But the mission’s success—or lack thereof—could also inform the timeline of SpaceX’s Starship, the largest and most powerful rocket ever built.

Polaris Dawn is the first of three missions purchased by Isaacman. Little is known about the second, Polaris II, which will also use Dragon and Falcon 9. But Polaris III is intended to be the debut human spaceflight mission for Starship, which so far has completed four orbital test flights.

“It could very well be the [Boeing] 737 for human spaceflight someday,” said Isaacman. “But it’ll certainly be the vehicle that will return humans to the moon and then on to Mars and beyond.”

SpaceX CEO Elon Musk has grand ambitions for Starship, such as ferrying humans to Mars in order to create a colony. But they will hinge on the company remaining on schedule—and, hopefully, learning as much as possible about its EVA spacesuits during Polaris Dawn.

Within one week of Dragon’s splashdown, the firm plans to host a Polaris Dawn mission debrief and question-and-answer session on X Spaces.

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That’s not the beginning of a bad joke, but rather a description of SpaceX’s newly announced human spaceflight mission, which as soon as this year will send four astronauts to the ends of the Earth for the first time in history.

The company on Monday unveiled Fram2—a mission to explore the planet’s polar regions, over which no spacecraft has ever flown directly. During the three-to-five-day mission, which will launch from Florida atop SpaceX’s Falcon 9 rocket, the crew will enter a 90-degree polar orbit and observe the Arctic and Antarctic wilderness through a cupola fitted to the company’s Dragon capsule.

No crewed spacecraft has ever reached an orbital path higher than 65 degrees, a feat the Soviet Vostok 6 mission, which carried the first woman to space, achieved in 1963. Typically, such orbits are occupied by smaller satellites, while larger spacecraft such as the International Space Station fly closer to the equator.

The expedition, named after the ship Fram used by Norwegian explorers to reach the poles in the late 19th century, will be Dragon’s sixth commercial astronaut mission and third free-flying mission. The spacecraft has flown three private missions to the ISS for customer Axiom Space, completed the Inspiration4 private orbital spaceflight on behalf of billionaire entrepreneur Jared Isaacman, and will launch another mission for Isaacman—Polaris Dawn—as soon as this month.

“Polaris Program, Inspiration4, Axiom, & now Fram2 showcase what commercial missions can achieve thanks to @SpaceX’s reusability and NASA’s vision with the commercial crew program,” Isaacman said in a post on social media platform X, which is owned by SpaceX CEO Elon Musk. “All just small steps towards unlocking the last great frontier.”

Fram2 similarly is backed by a wealthy CEO, entrepreneur and adventurer Chun Wang, who made his fortune from Bitcoin mining. Wang purchased the mission for an undisclosed amount and will serve as commander.

According to his profile on X, Wang is an avid traveler who has visited half of the world’s countries and territories. But he has grander aspirations.

“I’ve read many sci-fi stories about the first human missions to Mars, usually led by NASA or some fictional government,” Wang said in a post on X. “Rarely does anyone dare to imagine such a mission may be carried out privately. But now, I increasingly believe that someday we will reach Mars—and it may be a person, or a company, not a nation, who gets there.”

Accompanying Wang will be commander Jannicke Mikkelsen of Norway, pilot Eric Philips of Australia, and mission specialist Rabea Rogge of Germany, who told the website Everyday Astronaut they befriended the blockchain entrepreneur on a trek to the North Pole. All four crew members will be making their first trip to the final frontier.

Mikkelson is a filmmaker who seeks out remote or hazardous filming locations and served as payload specialist on the 2019 One More Orbit mission—a record-breaking polar circumnavigation flight on the 50th anniversary of Apollo 11.

According to its website, Fram2 will shatter One More Orbit’s high water mark of 46 hours and 40 minutes, achieved in a Qatar Executive Gulfstream G650ER ultra-long-range business jet, by flying from the north to south pole in just 46 minutes.

Philips, a polar adventurer and guide, knows those regions well, having completed several ski expeditions. But viewing them from orbit has never been possible, even for astronauts on the ISS, to whom they appear invisible.

Fram2 will orbit at about 264-280 miles above Earth, allowing the crew to study strange green and purple light emissions known as Strong Thermal Emission Velocity Enhancements (STEVE), atmospheric phenomena that resemble auroras. Researchers have yet to determine what causes the optical abnormalities. The mission will weigh input from space physicists and citizen scientists alike.

“Having spent much of my adult life in the polar regions this is an incredible opportunity to view the Arctic and Antarctica from space, in particular Antarctica which will be fully lit at this time of year,” said Philips.

Rogge similarly has a fascination with extreme environments, having researched ocean robotics in the Arctic in pursuit of ways to improve the technology. She will get the chance to study tools that could prepare humans for future missions to Mars and beyond, “from capturing the first human x-ray images in space to Just-in-Time training tools to the effects of spaceflight on behavioral health,” according to Fram2’s webpage. The crew will also study what happens to the human body after weeks or months in space.

“Wang aims to use the mission to highlight the crew’s explorational spirit, bring a sense of wonder and curiosity to the larger public, and highlight how technology can help push the boundaries of exploration of Earth and through the mission’s research,” SpaceX said in an update on its website.

Since 2020, SpaceX has flown 50 astronauts to low-Earth orbit across 13 human spaceflight missions, more than any private company. These include the three Axiom Space missions, Inspiration4, and eight NASA Commercial Crew rotation missions to the ISS, as well as the Demo-2 test flight.

Competitors Blue Origin and Virgin Galactic, meanwhile, have each completed seven commercial human spaceflights.

All three companies, in addition to NASA contractors such as Boeing and Northrop Grumman, are part of an emerging trend that could soon become the norm. NASA has predicted that when the ISS is retired at the end of the decade, it could become one of many customers enlisting the services of private spaceflight companies, rather than a provider of those services.

That could mean more private astronaut missions financed by millionaire and billionaire backers.

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NASA officials on Wednesday held a media briefing, during which stakeholders revealed that confidence in Starliner’s ability to return the astronauts is waning. According to Ken Bowersox, associate administrator of the agency’s Space Operations Mission Directorate, teams are “getting more serious about evaluating our other options.”

The primary alternative, officials said, is to fly SpaceX’s upcoming Crew-9 mission with two astronauts rather than four, leaving room for Wilmore and Williams to hitch a ride when that mission concludes in February. They estimated that NASA will make a decision by mid-August.

“We could take either path,” Bowersox said.

Boeing and SpaceX representatives were not present on the call, the intention of which, NASA said, was to provide the agency’s perspective on the mission.

On its way up to the ISS, Starliner suffered two main issues that are giving crews pause over how to return the astronauts. A set of helium leaks that emerged on the spacecraft have since stabilized, according to NASA. However, the other issue, which involves five faulty reaction control system (RCS) thrusters on Starliner’s expendable service module, is still being evaluated.

Officials on Wednesday said ground testing of an identical thruster at White Sands Test Facility in New Mexico revealed that the problem is linked to a tiny Teflon seal on an oxidizer poppet, which controls the flow of propellant into the thruster. Teams theorize that the extreme heat the thrusters experienced during Starliner’s rendezvous with the ISS caused the Teflon to expand, inhibiting flow and causing them to fire at weaker-than-expected levels.

According to Steve Stich, who manages NASA’s Commercial Crew program, a July 27 Starliner hot fire test showed that the affected thrusters—with the exception of one, which has been deactivated—are now firing as expected. This has led engineers to hypothesize that the teflon seals contracted and are no longer blocking propellant from reaching the thrusters. Now, the task is to understand how and why.

Teams are working to better understand how those seals might behave during Starliner’s return trip, but there is not yet consensus on whether they are good to go. According to Bowersox and Stich, there is internal disagreement about returning the astronauts on Starliner versus Dragon, which was amplified with the discovery of the faulty teflon seal.

“We heard enough voices [on the program control board] that the decision is not clear,” said Bowersox.

The officials explained that Boeing, which on Friday asserted it has high confidence in Starliner, is viewing risk based on previous missions and flight performance, while NASA wants to understand the root cause of the issue before it has confidence in returning with crew. Ultimately, NASA administrator Bill Nelson will have the final say.

“Reasonable people could have different views on which path we should take,” said Bowersox, who acknowledged that the chance of an uncrewed return has risen in recent weeks. “I don’t think anyone has taken a view that you could prove is wrong or right.”

NASA will have until mid-August to decide whether the Dragon contingency plan should be put into action.

The ISS has two docking modules that are occupied by Starliner and SpaceX’s Crew-8 capsule, meaning Starliner would need to autonomously undock before Crew-9 launches on September 24. Crew-8 would then depart the space station with the crew of NASA’s Expedition 71, and the Crew-9 Dragon would take its place, leaving one docking port open for the next SpaceX cargo mission. Wilmore and Williams would stay for the duration of Crew-9, flying home with the two-person Expedition 72 crew in February.

The problem, though, is that Starliner’s flight software is not currently capable of an autonomous undocking despite having achieved the feat during an uncrewed mission in 2022.

For the CFT, the software was configured for a crewed undocking, as per the mission profile. Now, Boeing and NASA must modify the mission data load to reconfigure the system for an uncrewed undocking, which sources say could take up to one month. NASA said the spacecraft has built-in fault tolerance that would prevent it from colliding with the ISS should its thrusters not perform as expected during that maneuver.

The agency said it has been in daily communication with Wilmore and Williams and that the astronauts are prepared for whatever path it ultimately takes. If they stay along with Crew-9, they will assist personnel with scientific research, including spacewalks. Additional materials, such as spacesuits, would be sent up with the Dragon.

“Butch and Suni are ready to support whatever we need to do,” said Dana Weigel, manager of NASA’s ISS program.

Officials insist that despite the internal conflict around Starliner, the vehicle could still be used to return the astronauts in the case of a contingency on the ISS. In those scenarios, Bowersox said, NASA is willing to tolerate a higher level of risk—one that is jeopardizing teams’ ability to complete the CFT as intended.

The worst-case scenario, according to NASA, would be if the helium leak and thruster issues converge during Starliner’s deorbit burn, the maneuver that will place it back in Earth’s atmosphere. An unlikely combination of technical failures could impact the ability of the RCS thrusters to maintain the capsule’s orbital trajectory, though agency research predicts that it could complete the maneuver even with multiple failures.

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The spacecraft’s return marks the commercial space company’s 30th cargo resupply mission of the orbital outpost for the space agency.

Suspended under four deployed parachutes, the capsule landed in the Atlantic Ocean at 1:38 a.m. EST off the coast of Tampa, NASA said.

• READ MORE: NASA SpaceX Crew-8 Mission Successfully Launches After Delays

“Once Dragon has been retrieved by SpaceX’s recovery team, the critical science aboard the spacecraft will be transported via helicopter to [NASA’s Kennedy Space Center] and provided to researchers,”  SpaceX said in an update following the splashdown.

Later this week, the three NASA astronauts and a Roscosmos cosmonaut who comprise SpaceX Crew-8 currently aboard ISS are set to move a Dragon crew spacecraft capsule in order to make way for new crewmembers who could arrive at the space station as soon as next week. 

• READ MORE: NASA Astronauts Detail Daily Life, Firsts Aboard International Space Station

On Thursday, Crew-8 is set to move the Dragon crew spacecraft that is currently docked at the forward port of ISS’s Harmony module to its zenith port, NASA said. The undocking and redocking is expected to take less than an hour.

“That will clear the forward port of Harmony for the arrival of the Boeing Starliner spacecraft with Butch Wilmore and Suni Williams aboard on the Crew Flight Test (CFT) mission,” NASA said.

• READ MORE: NASA Is Asking for Help to Return Samples That Could Uncover Life on Mars

Launch of the Boeing Crew Flight Test is planned for 10:34 p.m. Monday at Cape Canaveral Space Force Station in Florida. It is expected to reach the ISS shortly before 1 a.m. EST May 8.

In preparation for the arrival of @NASA’s Boeing Crew Flight Test, four crew members will relocate the @SpaceX Dragon spacecraft to the space-facing port of the Harmony module on Thursday, May 2.

Live coverage of the relocation will begin at 7:30am ET. https://t.co/JmNvsHSYGu

— International Space Station (@Space_Station) April 29, 2024

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Shortly before 6 a.m. EDT Tuesday, the crew splashed down in a SpaceX’s Dragon spacecraft off the coast of Pensacola, Florida, nearly 19 hours after it autonomously undocked from the ISS. The astronauts were retrieved by the company’s recovery vessels, NASA said.

• READ MORE: NASA Crew-7 Astronauts Arrive at International Space Station

The Crew-7 mission launched August 26 on a SpaceX Falcon 9 rocket from NASA’s Kennedy Space Center in Florida. On board were astronauts from four different countries and three continents: NASA’s Jasmin Moghbeli, European Space Agency’s Andreas Mogensen, Japan Aerospace Exploration Agency’s Satoshi Furukawa, and Roscosmos’ Konstantin Borisov.

“After more than six months aboard the International Space Station, NASA’s SpaceX Crew-7 has safely returned home,” NASA Administrator Bill Nelson said in a statement. “This international crew showed that space unites us all. It’s clear that we can do more—we can learn more—when we work together. The science experiments conducted during their time in space will help prepare for NASA’s bold missions at the moon, Mars, and beyond, all while benefiting humanity here on Earth.”

• READ MORE: Ax-3 Commercial Astronauts Splash Down after 18 Days Aboard ISS

Following its liftoff, the crew traveled 84,434,094 miles during the mission, spent 197 days aboard the space station, and completed 3,184 orbits of Earth, according to NASA.

Crew-7’s return marks the latest milestone for NASA’s commercial crew program and comes a week after the successful SpaceX launch of three NASA astronauts and a Roscosmos cosmonaut to ISS as a crew rotation.

• READ MORE: NASA SpaceX Crew-8 Mission Successfully Launches After Delays

The Dragon spacecraft, which has supported two other ISS crew rotations, will be returned to Florida for inspection and refurbishment at Cape Canaveral Space Force Station to ready it for its next flight, NASA said.

Splashdown of Dragon confirmed – welcome back to Earth, @AstroJaws, @Astro_Andreas, @Astro_Satoshi, and Kostya! pic.twitter.com/iugZ6Awwvn

— SpaceX (@SpaceX) March 12, 2024

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The mission, dubbed Crew-8, lifted off  from Launch Complex 39A at NASA’s Kennedy Space Center in Florida at 10:53 p.m. EST, marking NASA’s eighth commercial ISS crew rotation.

The launch had initially been planned for Friday but was delayed twice due to high winds along the spacecraft’s ascent path.

Standing down from tonight’s launch of Crew-8 due to elevated winds in Dragon’s ascent corridor. Now targeting Sunday, March 3 for liftoff

— SpaceX (@SpaceX) March 3, 2024

On board the Dragon Endeavour spacecraft were NASA astronauts Matthew Dominick, Michael Barratt, and Jeanette Epps, as well as Roscosmos cosmonaut Alexander Grebenkin. 

• READ MORE: NASA SpaceX Crew-8 Mission Launch Date Set

“On this eighth crew rotation mission, we are once again showing the strength of our commercial partnerships and American ingenuity that will propel us further in the cosmos,” NASA Administrator Bill Nelson said Monday. “Aboard the station, the crew will conduct more than 200 science experiments and technology demonstrations to help fuel this new era of space exploration and benefit humanity here on Earth,” 

The crew is scheduled to arrive at ISS on Tuesday around 3 a.m. EST, when the spacecraft will autonomously dock with the forward port of the space station’s Harmony module.

• READ MORE: SpaceX Launch Sends 4 Private Astronauts to ISS

Once Crew-8 arrives, it will overlap with the existing ISS astronauts, Crew-7, until they depart to return to Earth a few days later, NASA said.

NASA is providing live coverage of the Crew-8 mission docking event and hatch opening starting at 3 a.m. EST. It may be viewed here.

Liftoff of Crew-8! pic.twitter.com/wqTFNNDGR9

— SpaceX (@SpaceX) March 4, 2024

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