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Saturn, Neptune, and Uranus also have very close to Earth-normal gravity. I don't know what a human habitation at surface-level would be like on such a world,
by elihu 6y ago
Saturn, Neptune, and Uranus also have very close to Earth-normal gravity. I don't know what a human habitation at surface-level would be like on such a world, or how to escape the gravity well if you ever wanted to leave, but when it comes to surface gravity, it's pretty weird that our planetary system has five planets with almost the same gravity.
It's either an amazing coincidence, or something about planet formation in our solar system that makes ~1G planets very likely.
- Chris2048 6y agoGas-planets would be a challenge with no habitable surface, especially those with high winds. Would a floating sky habitat be any easier than just living in space? But anything at or near Neptune receives very little light. There's a big gap between Mars and Jupiter (5.2au vs 1.5au), 10au to Saturn, and then a massive gap to Neptune (30au); anything habitable probably needs to be in the Mars-Venus band, fairly close to the sun.