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Stellarparallax parsec1.svg
A parsec is the distance frae the Sun tae an astronomical object that haes a parallax angle o ane arcseicont (nae tae scale)
Unit information
Unit seestem astronomical units
Unit o lenth/distance
Seembol pc 
Unit conversions
1 pc in ...... is equal tae ...
   metric (SI) units    3.0857×1016 m
   ~31 petametres
   imperial & US units    1.9174×1013 mi
   astronomical units    2.06265×105 au
   3.26156 ly

The parsec (seembol: pc) is a unit o lenth uised in astronomy, equal tae aboot 3.26 licht-years, or aboot 30.9 trillion kilometres (19.2 trillion miles).