parallactic motion

parallactic motion

noun Astronomy.
the apparent motion of stars due to the earth's orbital motion.

Origin:
1885–90
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Parallactic motion is always a great word to know.
So is Virgo. Does it mean:
the distance traversed by light in one mean solar year, about 5.88 trillion mi. (9.46 trillion km)
a zodiacal constellation between Leo and Libra, containing the bright star Spica also called the Virgin
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