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Resource Type Movie
Topics 3.26
Submitted by numberphil
Date Submitted Mon 02 May 2016
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A parsec (symbol: pc) is a unit of length used to measure large distances to objects outside the Solar System.

One parsec is the distance at which one astronomical unit subtends an angle of one arcsecond.

A parsec is equal to about 3.26 light-years (31 trillion kilometres or 19 trillion miles) in length.

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