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How much water could we add until the water molecules would turn into something else due to gravity? It depends on how close this "waterworld" is to its parent star and thus how hot it is. Water has several phases and/or crystalline structures at temperatures and pressures that aren't typical of Earth. What would the composition of this "planet" be if we ...


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The lunar environment is actually quite a bit more harsh than Mars. Between dust, long day/night cycles, more extreme temperature cycles, and other things, it really isn't trivial to build for the Moon. In addition, there are a large number of price points for different missions. VIPER is at the lower point, while Curiosity is at the higher point. By using ...


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