hipparchus satellite

Hip·par·chus sat·el·lite

H h

Definition of hipparchus satellite words

noun hipparchus satellite an astronometric satellite launched in 1989 by the European Space Agency that measured the position, proper motion, and brightness of 118 218 stars down to 12th magnitude and the magnitude and colour of a million stars down to 10th magnitude 0

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A common word. It’s meaning is known to most children of preschool age. About 96% of English native speakers know the meaning and use the word.

Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".

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