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The Earth moves in an orbit around the sun, so the only way this would be a problem is if the asteroid were not visible at all until only a few months (or even
by jstanley 7y ago
The Earth moves in an orbit around the sun, so the only way this would be a problem is if the asteroid were not visible at all until only a few months (or even less?) before impact.
- Cogito 7y agoTo a first-order approximation, and from far enough away, a collision with the Earth is a collision with the Solar System. Our motion within the Solar System is relatively small if the asteroid is a very long way away; it's easy to find scenarios where a fast moving asteroid will appear stationary over a 6 month period.