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| par·sec [ pr sèk ] (plural par·secs) |
noun |
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| Definition: |
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3.262 light-years: an astronomical unit of distance equal to 3.262 light-years. A parsec is the distance from which the Earth's distance from the Sun would subtend one second of arc.
Symbol pc
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| [Early 20th century. <parallax + second2] |
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