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What would it take to survive the radiation on the surface of Ganymede?

A Couple Feet of Concrete Starting with 5 Rem per day surface radiation quoted on Wikipedia / Carl Witthoft's answer, you can calculated that shielding required for prolonged exposure would be several ...
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Titan vs Mars for colonization

If we ever wanted to make very durable spaceships to go out among the stars somehow then Titan would seem to be a better place to set up shop for it, and you can tell, since, for one thing, we could ...
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