Facts of the Matter: Cosmic radiation poses threat to astronauts bound for Mars
By Richard Brill, Special to the Star-Advertiser
Nov. 20, 2020
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NASA / ASSOCIATED PRESS / 2015
Astronauts in low-Earth orbit — aboard the International Space Station, for example — avoid the harshest effects of cosmic radiation because there is still a bit of atmosphere, as well as the Earth itself, to protect them. NASA astronaut Scott Kelly executes a spacewalk outside the International Space Station.