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Dictionary


prop'er mo'tion




Astron.the angular motion of a star relative to a suitably defined frame of reference, expressed in seconds of arc per year. Cf. tangential motion.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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See also:
  • Strict Standards: Non-static method FenSites::linkTo() should not be called statically in /site/html/dictionary/proper-motion.html on line 105 proper motion (Encyclopedia)

 

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