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 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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The post Polaris Dawn Is SpaceX’s Most Experimental—and Risky—Human Spaceflight Yet appeared first on FLYING Magazine.

SpaceX on Saturday unveiled its first-generation extravehicular activity (EVA) spacesuit, which will be donned by astronauts aboard the Polaris Dawn mission, scheduled for no earlier than this summer. Polaris Dawn—a five-day, four-person orbital mission to research human health both in space and on Earth—is the first of three potential human spaceflights under the Polaris Program.

SpaceX and entrepreneur Jared Isaacman, who founded the program in February 2022, held a discussion accompanying the announcement on social media platform X, formerly Twitter, which SpaceX CEO Elon Musk acquired in October..

While the mission has no firm launch date, SpaceX on Saturday confirmed that Polaris Dawn would be the next crewed mission the company will fly.

What Is Polaris?

The Polaris Program is the brainchild of Isaacman, the billionaire CEO of integrated payments provider Shift4 who is also a pilot and astronaut, with more than 7,000 flight hours and multiple experimental and ex-military aircraft ratings. Isaacman in 2012 founded Draken International, a private air force that trains pilots for the U.S. Armed Forces.

Isaacman purchased flights from SpaceX in February 2022 to launch the program and is funding Polaris Dawn himself.

Named after the constellation of three stars more commonly known as the North Star, or Polaris, the program comprises three potential missions, one for each star. The effort aims to rapidly advance human spaceflight capabilities with an eye toward future missions to the moon, Mars, and beyond. Simultaneously, it will raise funds and advance research into issues facing humanity on Earth, such as cancer.

Polaris Dawn, the first of the three missions, was announced in 2022 and expected to fly later that year. It has since been delayed multiple times, most recently from February to mid-2024, due in part to SpaceX’s development of the specially designed EVA spacesuits.

Polaris Dawn and a second mission without a timeline, simply called Mission II, will be flown using SpaceX’s Falcon 9 rocket and Crew Dragon capsule. Both vehicles are already in use by NASA and a handful of commercial customers, such as Axiom Space.

Falcon 9, a reusable two-stage rocket, is the world’s first orbital class reusable rocket and has been lauded for driving down launch costs in flying 330 times. Crew Dragon, which is capable of carrying up to seven passengers, in 2020 restored NASA’s ability to ferry astronauts to and from the International Space Station (ISS) with the first Commercial Crew rotation mission. It has flown a total of 46 missions, visiting the ISS on 42.

Polaris is expected to culminate in a third mission comprising the first crewed flight of SpaceX’s Starship, the largest and most powerful rocket ever built. Like Falcon 9, the spacecraft is designed to be fully reusable and has so far attempted three orbital test flights, each more successful than the last.

Isaacman has been outspoken about Polaris’ aim to make human spaceflight accessible to all. The new SpaceX suits, for example, are designed to fit a range of body types and accommodate all spacewalkers.

At the same time, the billionaire aviator is focused on solving problems on Earth. Since its founding, Polaris has worked closely with St. Jude Children’s Research Hospital and helped fund research into childhood cancer.

Civilians in Space

Polaris Dawn is notable for its four-person crew, which includes the first SpaceX employees expected to actually reach space.

Mission specialist Sarah Gillis oversees the company’s astronaut training program, while mission specialist and medical officer Anna Menon manages crew operations. Gillis, trained to be a classical violinist, joined SpaceX in 2015, while Menon is a seven-year NASA veteran. But both have been part of past Crew Dragon flights. Menon in particular was influential in developing Dragon’s crew and emergency response capabilities.

Joining the SpaceX employees will be pilot Scott Poteet, a retired Air Force lieutenant colonel with more than 3,200 flying hours in the F-16, A-4, T-38, T-37, T-3, and Alpha Jet.

Isaacman himself will serve as Polaris Dawn mission commander, a role he also filled for  SpaceX’s 2021 Inspiration4 mission: the first all-civilian mission to space. Poteet, who previously served in roles at Isaacson’s companies Shift4 and Draken, was mission director for that flight, which raised $250 million for St. Jude.

To prepare for Polaris Dawn, crewmembers lived inside the decompression chamber at NASA’s Johnson Space Center in Houston for two days, summited the 16,800-foot peak of Illinizas Norte volcano in Ecuador, and experienced 9 Gs of force while training on three different kinds of fighter jets.

The mission will launch from Launch Complex 39A at Kennedy Space Center in Florida. The crew will spend up to five days in orbit, performing about 40 experiments and testing of hardware and software. Like Inspiration4, it is a charitable effort, with the goal of raising additional funds for St. Jude.

“Fifty or 100 years from now, people are going to be jumping in their rockets, and you’re going to have families bouncing around on the moon with their kids at a lunar base,” said Isaacman in an article on the St. Jude website. “If we can accomplish all of that, we sure as heck better tackle childhood cancer along the way.”

Polaris Dawn aims to fly higher than any SpaceX Dragon mission to date, a height that hasn’t been reached since the end of the Apollo program half a century ago.

The crew will also attempt to reach the highest Earth orbit ever flown. Isaacman during the discussion on X said the mission will target an apogee of 1,400 kilometers, or about 870 miles, more than double the orbital height reached by Apollo 17. That orbit would place the crew just inside the Van Allen radiation belt, where it hopes to research effects of spaceflight and space radiation on human health.

“The benefit of being at this high altitude is that we can better understand the impacts of that environment…on both the human body…as well as on the spacecraft,” said Menon during the discussion on X.

Suit Up

The Dragon capsule will complete seven elliptical orbits until reaching its apogee before descending to a circular orbit at about 700 kilometers (435 miles). At that altitude, crewmembers will attempt the first commercial spacewalk. It would also be the first time four astronauts have been exposed to the vacuum of space at the same time, according to SpaceX.

The spacewalk will mark the first use of SpaceX’s EVA spacesuit in low-Earth orbit, a key milestone that is expected to inform future iterations of the design for long-duration missions.

It’s an evolution of SpaceX’s Intravehicular Activity (IVA) suit that has been modified to enable both intra and extravehicular use. In other words, personnel won’t need to change clothes when moving from the confines of the spacecraft to the harsh environment of space.

The EVA suit adds greater mobility, seals and pressure valves, a helmet camera, and textile-based thermal material, which regulates suit temperature and can be controlled using a dial. Boots were constructed from the same thermal material used to shield Falcon and Dragon from exposure.

“There was a lot of work on both the materials of the suit, developing a whole new layer that we needed to add for thermal management as well as looking at the thermal condition for the crewmembers themselves, and making sure that they were at a comfortable temperature inside the suit,” said Chris Drake, manager of SpaceX’s spacesuit team, on Saturday.

The 3D-printed helmet incorporates a new visor designed to reduce glare as well as a state-of-the-art, heads-up display (HUD). The HUD is active only during spacewalks and displays spacesuit pressure, temperature, and humidity, as well as a mission clock to track how long the astronauts are exposed to the vacuum of space.

Already, SpaceX is developing a second-generation EVA suit for missions to the moon and Mars. It estimates that millions of suits will be required to one day build a lunar base or Martian city.

“This is important because we are going to get to the moon and Mars one day, and we’re going to have to get out of our vehicles and out of the safety of the habitat to explore and build and repair things,” Isaacman said during the discussion on X.

The Dragon capsule has also required modifications to prepare for the landmark spacewalk. SpaceX on Saturday said a structure called “Skywalker” has been attached near the capsule’s hatch to act as a mobility aid. Handrails and foot rails have been installed inside the spacecraft, with a ladder interface added to the hatch opening.

SpaceX also installed a cabin pressurization system that allows the interior of the capsule to withstand the vacuum of space as air is sucked out during the spacewalk. A repressurization system will stabilize it once the astronauts return.

Why It Matters

In addition to achieving the first commercial spacewalk and the highest orbital altitude ever recorded, Polaris Dawn hopes to test Starlink laser-based communications in space for the first time. Data from the test could help develop space communications for future missions.

In addition, Polaris and SpaceX selected 38 scientific experiments from 23 partner institutions—including NASA, the U.S. Air Force Academy, and Embry-Riddle Aeronautical University—intended to advance the understanding of human health in space and on Earth.

The crew will use ultrasound to study decompression sickness, for example, and will research spaceflight associated neuro-ocular syndrome: a disease unique to humans who fly in space that can have severe debilitating effects. Upon landing, astronauts will undergo tests to study anemia—an unavoidable effect of traveling to space—and other conditions that might impact humans on Earth.

The scientific aims of the Polaris Program differ from the commercial spaceflight ventures offered by companies such as Blue Origin and Virgin Galactic, which could be classified more aptly as space tourism operations.

Tickets for those companies’ orbital and suborbital offerings, some of which involve research, can range from the hundreds of thousands of dollars to the millions. Isaacman and SpaceX’s Inspiration4, meanwhile, raised a quarter of a billion dollars for cancer research.

Isaacman has been particularly outspoken when it comes to accessibility in spaceflight. And by taking on much of the risk himself, the billionaire businessman has lessened the pressure on SpaceX. Isaacman’s funding of Polaris Dawn has allowed the company to focus on developing the spacesuits and other technology necessary to ensure the mission runs smoothly.

Polaris Dawn also represents a critical juncture for SpaceX’s Starship, the lynchpin of the company’s planned human spaceflight offerings. The largest rocket ever built is not quite ready to fly humans. But when it is, the third Polaris mission is expected to be its maiden voyage.

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At age 16, Isaacman founded payment processing company Shift4, which processes more than 200 billion annually. He went on to co-found the Black Diamond Jet Team, flying in airshows in an Aero L-39, and Draken International, a company that provides tactical fighter aircraft and operational readiness training on contract for military and defense customers. In addition, he set a record circumnavigating the globe in his Cessna Citation Mustang in 2009—a trip that raised funds for the Make-A-Wish Foundation. Inspiration4 also included a fundraising component, bringing in over $250 million for St. Jude Children’s Research Hospital.

• READ MORE: Inspiration4 Astronauts Splash Down

“Whether it’s starting his first business at 16, dazzling airshow crowds, flying higher in orbit than even the Hubble Space Telescope or championing humanitarian causes, Jared Isaacman has committed his life to reaching the highest pinnacles of human achievement and exploration,” said NBAA president and CEO Ed Bolen. “We are pleased to present Jared with our Meritorious Service to Aviation Award. His endless aspiration and commitment to inspiration and service truly exemplify the high standards of this prestigious honor.”

Following the presentation, Isaacman was interviewed by fellow Inspiration4 crew member Sian Proctor. He spoke of his lifelong fascination with aviation, including building his first computer as a child so he could play combat flight simulator Falcon 3.0 and search for meaningful challenges both on the ground and above it.

Isaacman has organized three additional flights—called the Polaris program—with SpaceX, aiming to return to space as commander of the Polaris Dawn mission. Polaris Dawn, which is tentatively planned for the first quarter of 2024, is expected to include the first extravehicular activity (EVA/spacewalk) by a private civilian. The third Polaris flight is intended to be the first crewed flight of SpaceX’s Starship.

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