Parsec

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Parsec

</dt>
A unit of length equal to the distance from the sun to a point having a heliocentric parallax of 1 second (1"), used as a measure of stellar distance. </dd>
The name parsec is derived from the words parallax second. 1 parsec = pc = 3.084 X 10E13 kilometers = 206,265 astronomical units = 3.262 light years </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use