A
unit of
length, 1 parsec or 1 pc = 3.085 68 x 10
16 meters. It is defined by the fact that an object at a distance of 1 parsec has a yearly
parallax of one [second of an arc]
?. In
astronomy, nowadays the parsec is preferred to the
light year. A parsec is approximately 3.26 light years.
see also conversion of units, astronomical unit
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