Parsec
Unit of length
The parsec is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units, i.e. 30.9 trillion kilometres. Wikipedia
1 pc in: is equal to
astronomical units: 2.06265×105 au; 3.26156 ly
imperial US units: 1.9174×1013 mi
metric (SI) units: 3.0857×1016 m; ~31 petametres
Symbol: pc
Unit of: length/distance
Unit system: astronomical units