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by jccooper
737 days ago
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An airless Earth would be extremely hard to land on. You could easily get to quite low altitude, but orbital velocity at sea level is almost 8km/2... faster than at "orbital altitude". Once you hit an orbit intersecting the ground, you have to scrub all your speed in whatever that amount of time is, which is gonna be short. It's basically an orbital launch in reverse. |
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