After a 10-month stay at the International Space Station, NASA astronauts Butch Wilmore and Suni Williams are set to return to Earth. The duo spent their time on the ISS conducting science experiments, witnessing spacewalks, and connecting with Russian cosmonauts. So, how did their bodies withstand the prolonged exposure to space? Here’s what we know.
Physiological effects of space travel are a major concern for NASA. Astronauts face higher levels of radiation, isolation, and confined environments, which can lead to physiological deterioration. To mitigate these risks, NASA gathers data from long-duration spaceflights to advance crew safety.
Regular health checks are also crucial for astronauts. They undergo routine medical evaluations and are monitored by flight surgeons while in space. The space agency ensures the ISS is stocked with essential resources, including food, supplies, water, clothing, and oxygen, through regular supply missions every three months.
The longest person to stay in space is NASA astronaut Frank Rubio, who spent 371 days on the ISS without a break. Other notable records include Mark Vande Hei’s 355-day stay and Scott Kelly’s 340-day tenure.
Sleeping in space requires some creativity. Since conventional beds aren’t available, astronauts sleep in specially designed sleeping bags that attach to walls in microgravity. Crew members typically get about eight hours of rest per day.
Exercise is also crucial for maintaining muscle and bone health in space. ISS crew members must exercise for two hours a day to counteract the effects of weightlessness on their bodies.
With Wilmore’s and Williams’ return, NASA takes another step towards advancing crew safety and expanding our understanding of human physiology in space.
Source: https://eu.usatoday.com/story/news/nation/2025/03/15/astronauts-bodies-space-starliner/82415478007