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A parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond,[1] which corresponds to 7005648000000000000♠ 648 000 / π astronomical units
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Parsec - Wikipedia
0♠1.9174×10 13 mi astronomical units 7016308568047999355♠2.06265×10 5 au 7016308567400801506♠3.26156 ly The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System. <span>A parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond, [1] which corresponds to 7005648000000000000♠648000/π astronomical units. One parsec is equal to about 3.26 light-years (30 trillion km or 19 trillion miles) in length. The nearest star, Proxima Centauri, is about 1.3 parsecs (4.2 light-years) from the Sun.


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