The huge rocks that hurtle through space may prove to be lifesavers for astronauts. Clays extracted from asteroids could be used on deep space missions to shield against celestial radiation.
Radiation from cosmic rays is one of the biggest health risks astronauts will face on long space missions, such as a proposed trip to Mars or settlement on the moon. A 2013 study suggested that a return trip to Mars would expose astronauts to a lifetime’s dose in one go.
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