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Health threats from cosmic rays are the dangers posed by cosmic rays to astronauts on interplanetary missions or any missions that venture through the Van-Allen Belts or outside the Earth's magnetosphere.[1][2] They are one of the greatest barriers standing in the way of plans for interplanetary travel by crewed spacecraft,[3][4][5] but space radiation health risks also occur for missions in low Earth orbit such as the International Space Station (ISS).[6]
In October 2015, the NASA Office of Inspector General issued a health hazards report related to space exploration, including a human mission to Mars.[7][8]
Whenever the ISS flew through the South Atlantic Anomaly, we were exposed to a much greater flux of [galactic cosmic radiation].