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What's funny is that in terms of delta-V, the surface of Deimos (Mars' second moon) is actually closer to us than the surface of the Moon.

Of course in travel time the distances are very different. Delta-V is not the only factor that matters.



Interesting. How does that work for Deimos specifically? I've read that landing on Mars takes less delta-V than the Moon because you can aerobrake, but that doesn't apply to Deimos. Is that because of its nearly nonexistent gravity, or is there some other factor?




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