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Each of the four crew members aboard SpaceX’s Polaris Dawn mission reported different physical sensations during their history-making trip, which sent the private astronauts into a higher orbit around Earth than any human has ventured in decades.
“My vision acuity started to deteriorate those first few days,” Scott “Kidd” Poteet, a former US Air Force pilot, told 【 - Free Best Performing Stock Alerts 】’s Dr. Sanjay Gupta in a recent interview.
His crewmate Anna Menon, a SpaceX engineer who was thePolaris Dawn mission’smedical officer, said she was struck by space adaptation syndrome. It’s a phenonmenon that affects roughly60% to 80% of peoplewho travel to orbit, though astronauts rarely openly discuss the ailment.
“It can be a whole spectrum of experience from lightheadedness, nausea, all the way to vomiting,” Menon said. “I experienced really the whole gamut.”
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But the Polaris Dawn mission — a five-day journey to orbit carried out by the private sector rather than NASA — sought to take that research further, hoping to unravel some of the most troublesome aspects of spaceflight.
During the mission, the crew carried out a variety of health-focused experiments, including wearing special contact lenses that measured the pressure in their eyes and undergoing MRI scans to track changes to the anatomy of their brains.
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“Some 600 people have been to orbit in the last 60 years — more than half have gotten space adaptation syndrome,” Isaacman said. “And you’re talking about (mostly government astronauts) — some of the most highly screened individuals. … That’s just underscoring the importance of why we have to solve this, if we’re going toput hundreds or thousands of people in space one day.”
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“If you think of a future where there’s thousands of people living in space and they eventually — after nine months’ travel — you get to the surface of Mars, and a huge percentage (of people) have vision changes that make them unable to do their work, unable to read their procedures — that’s a big problem,” Menon said of why SpaceX hopes to find answers to pressing in-space medical conditions.
During the September mission, the Polaris Dawn crew conducted thefirst commercial spacewalkas well as ventured into the lower band of Earth’s Van Allen radiation belts, which are areas within Earth’s magnetic field where pools of radiation from the sun lie trapped.
Initial reports from the Polaris Dawn crew did not necessarily reveal any specific health effects from radiation exposure, although Isaacman said he saw “sparkles or lights” when he closed as eyes, just as other NASAastronauts who have ventured through high-radiation environments havereported. This phenomenon isnot yet well understood.
However, Poteet said his vision was noticeably less sharp during the first few days in space, which may point to a condition called spaceflight associated neuro-ocular syndrome,or SANS.
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Poteet’s vision changes may have shown up in the data collected by the special contact lenses worn by the crew, which they nicknamed the “cyborg experiment.” The contacts were designed to collect data on interocular pressure over the course of their mission, Menon said.
“This is novel because you’re getting long-duration data. And you can then really better understand how that transition occurs over the course of time and especially that early time in space,” she said. “We are really interested to see what the researchers come back with when they have the chance to look through all this data.”
Dr. Allison Hayman, a researcher and associate professor at the University of Colorado Boulder, which led the cyborg experiment, said Friday that researchers had not yet received preliminary data from the mission.
In all, the Polaris Dawn team carried out 36 experiments on behalf of31 partner institutions, including universities and NASA.
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“People assume there’s a correlation between motion sickness (on Earth) and space adaptation syndrome,” he said. “I have a tendency to get motion sickness in the back of an Uber. … But I actually didn’t experience those symptoms (in space).”
“It really gave me just a huge appreciation for how it can impact your ability to work and get things done, especially in those early adaptation days,” Menon said.
Before takeoff, Isaacman — the only crew member with previous space travel experience — told 【 - Free Best Performing Stock Alerts 】 that medication administered to treat space adaptation syndrome symptoms can put people to sleep for eight hours or so. (He led a previous self-funded trip to orbit calledInspiration4in 2021.)
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Gillis, whose job at SpaceX includes training NASA astronauts headed for orbit, said in a 【 - Free Best Performing Stock Alerts 】 interview before liftoff that “human spaceflight is not going to be glamorous all the time” because of the discomfort microgravity can wreak on the human body.
Upon her return, Gillis reflected on the effects. “It’s been so incredibly fascinating to actually go through all of those changes to see how your body responds, and how the fluid shift impacts you, and how all of your organs kind of shift inside you,” she said.
“We don’t thrive without atmosphere, without oxygen,” Gillis added. “I think that really just underscores the importance to me of the research we are doing, the data we’re collecting.”
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