Submitted by Atmo_reetry t3_yyfqzi in space
diogenes_shadow t1_iwxigyz wrote
In a two body universe, objects starting far apart will either collide or fall into an oval orbit retaining the original distance as the major axis.
For a planet to capture a wandering moon, as your question might mean, it takes help. If the original vectors are helpful, and the time sequence imposes the right acceleration, the moon wandering past can be permanently captured. Orbit might not be circular at first, but yes, it is possible.
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