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Astronauts age more slowly than people on Earth. The difference isn't noticeable though — after spending six months on the ISS, astronauts age about 0.005 seconds less than the rest of us.
Put another way, the space ship sees the image change from a red-shift (slower aging of the image) to a blue-shift (faster aging of the image) at the midpoint of its trip (at the turnaround, 3 years after departure); the Earth sees the image of the ship change from red-shift to blue shift after 9 years (almost at the end of the period that the ...
It's a different kind of space age. Why astronauts age slower in space: Here’s how much younger stranded explorers will be when they return to Earth Skip to main content
Gravitational time dilation is at play e.g. for ISS astronauts. While the astronauts' relative velocity slows down their time, the reduced gravitational influence at their location speeds it up, although to a lesser degree. Also, a climber's time is theoretically passing slightly faster at the top of a mountain compared to people at sea level.
It is still unknown whether bone recovers completely. Unlike people with osteoporosis, astronauts eventually regain their bone density. [citation needed] After a 3–4 month trip into space, it takes about 2–3 years to regain lost bone density. [citation needed] New techniques are being developed to help astronauts recover faster. Research on ...
For two years, NASA trains its astronauts, including have them work underwater and learn desert survival skills, to get them ready for space travel. Photos and videos show why only 360 people have ...
The Mir sample involved 13 astronauts and cosmonauts and 58 American and Russian mission control personnel. The corresponding numbers in the ISS study were 17 space travelers and 128 people on Earth. Subjects completed a weekly questionnaire that included items from a number of valid and reliable measures that assessed mood and group dynamics.
British astronaut Tim Peake became the first man to complete a marathon in space on Sunday, running the 26.2 mile distance while strapped to a treadmill.