Meaning Of The Word Proper motion
What's the definition of Proper motion? Find Proper motion meanings, definitions and more at the Real Dictionary online.
Proper motion Meaning
| Proper motion Definition |
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What's The Definition Of Proper motion?
proper motion in American English
noun: the angular motion of a star relative to a suitably defined frame of reference, expressed in seconds of arc per year proper motion in British English noun: the very small continuous change in the direction of motion of a star relative to the sun. It is determined from its radial and tangential motion |
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