New answers tagged the-sun
3
You would be relatively protected on Mars, due primarily to the atmosphere. Directly overhead, you have ~16 g/cm^2 of CO2 atmosphere on average, far more along lines of sight closer to the horizon, and the entire planet blocking radiation from below, in all reducing radiation exposure by several orders of magnitude. There's also a significant day/night ...
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The simple answer is: it won't kill immediately but depending on the length of the exposure before reaching a shielded area, it would definitely cause radiation sickness which would result in a whole bunch of symptoms similar to the symptoms recorded after the exposure to radioactive fallout during the Chernobyl reactor accident (like cancer, neural damage ...
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