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Questions regarding the movements and interactions of astronomical bodies as it relates to spacecraft, their trajectories, and their maneuvers. For the motion of spacecraft themselves, see [orbital-mechanics].

3 votes
1 answer
68 views

Galactic location from spectrum and red/blue shift

I recently realized that the state of the galaxy as we perceive it from Earth is entirely unique; because of relativity, celestial objects are all viewed with out of date information, but as we observ …
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