Definitions from Wiktionary (proper motion)
▸ noun: (astronomy) The change in apparent position of a celestial body due to that body's velocity relative to the Sun.
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▸ noun: (astronomy) The change in apparent position of a celestial body due to that body's velocity relative to the Sun.
Similar:
lation,
angular motion,
aberration of light,
mean anomaly,
retrograde motion,
aberration,
diurnal motion,
movement,
motion parallax,
planetary aberration,
more...
▸ Words similar to proper motion
▸ Usage examples for proper motion
▸ Idioms related to proper motion
▸ Wikipedia articles (New!)
▸ Words that often appear near proper motion
▸ Rhymes of proper motion
▸ Invented words related to proper motion