Galactic cosmic rays (GCRs) are of most concern to NASA. It is challenging to shield against GCRs. They come from exploding stars called supernovae. Credit: NASA
Charged particles may be small, but they matter to astronauts. NASA’s Human Research Program (HRP) is investigating these particles to solve one of its biggest challenges for a human journey to Mars: space radiation and its effects on the human body. “One of our biggest challenges on a mission to Mars is protecting astronauts from radiation,” said NASA Space Radiation Element Scientist Lisa Simonsen, Ph.D.. “You can’t see it; you can’t feel it. You don’t know you’re getting bombarded by radiation.”
A common misconception of space radiation is that it’s similar to radiation on Earth. It’s actually quite different...
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