Parsec

A parsec (symbol:pc) is a unit of lenght used in astronomy. The word "parsec" derivates from "parallax of one arc second" and is the result of the method of trigonometric parallax.

One parsec corresponds to:


 * 360 × 60 × 60/(2π) = 206,264.8062 AU
 * 3.085 677 58 × 1016 m
 * 1.917 351 16 × 1013 miles
 * 3.261630751 light-years