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Dictionary

par•sec

Pronunciation: (pär'sek"), [key]
—n. Astron.
a unit of distance equal to that required to cause a heliocentric parallax of one second of an arc, equivalent to 206,265 times the distance from the earth to the sun, or 3.26 light-years.

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

parse

Parsee

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