Parsec is a
unit of
length or distance. One parsec, or 1 pc, is the distance from Earth of an object which has a yearly
parallax of one [second of an arc]
?; it equals
3.085 68 x 1016 meters or 3.26
light years. In
astronomy, nowadays the parsec is preferred to the
light year.
see also conversion of units, astronomical unit
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