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Space medicine is a developing medical practice that studies the health of astronauts living in outer space. The main purpose of this academic pursuit is to discover how well and for how long people can survive the extreme conditions in space, and how fast they can re-adapt to the Earth's environment after returning from space.
The rate of these conditions is relatively low (10-50 cases per 100,000 people per day) and most were non-emergency (trauma, infection, psychiatric disorders), but they required an evacuation that would be impossible to provide in space. Crews living and working in harsh environments (Antarctic expeditions, submarines, and undersea habitats ...
effects on biological damage related to differences between space radiation and x-rays; dependence of risk on dose-rates in space related to the biology of DNA repair, cell regulation and tissue responses; predicting solar particle events (SPEs) extrapolation from experimental data to humans and between human populations
Three of the flights had flown above the Kármán line (edge of space), and one was intended to do so. In each of these accidents, the entire crew was killed. As of December 2023, a total of 676 people have flown into space and 19 of them have died. This sets the current statistical fatality rate at 2.8 percent.
Asked why the Crew 9 Dragon couldn't return to Earth sooner, given that it's already docked at the station, Williams said that would leave the station with a single U.S. crew member aboard, Don ...
The risk will only grow as space debris remains in orbit, the study authors warned. Trackable objects in orbit have doubled in the last decade. The number of daily flights has also nearly doubled ...
[80] [81] In the first 28 U.S. Space Shuttle flights (2–11 d duration), serum insulin levels (n = 129) were elevated by 55% on landing day compared to before flight. [82] Russian space life science investigators reported two-fold or greater increases in insulin levels in three cosmonauts within 1 day after they returned from a 237-d flight. [83]
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