is a unit of measurement of length. The definition for parsec is the following:
One parsec is the distance of star with parallax shift of one arc second from a base of one astronomical unit.
The parsec, short for parallax of one arcsecond, is a unit of length used in astronomy, equal to about 31 trillion kilometers or 3.26 lightyears.
The symbol for parsec is pc
Parsec is compatible with the metre
base unit.Please note: The equivalent value of parsec in SI units is an approximation.