Parsec
Revision as of 19:08, 5 October 2011 by Daedalus-01 (talk | contribs)
A parsec (short for parallax second) is a unit of distance that is equivalent to 3.26 light-years. According to Merriam-Webster, it is "the distance to an object having a parallax of one second as seen from points separated by one astronomical unit".