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The application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other spacecraft.

2 votes
1 answer
338 views

How much could Earth's orbit shift without causing an ecological catastrophe?

Seeing the news about A/2017 U1 made me wonder what would happen if a similar object, but with a mass close to Earth's, had a close call with Earth. Could it shift Earth's orbit enough to quickly and …