History of Parsec

	Revision 14 . . November 24, 2001 8:31 am by (logged).17.228.xxx
	Revision 13 . . November 24, 2001 8:02 am by Eob
	Revision 12 . . (edit) September 26, 2001 1:24 am by RjLesch

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Changed: 1c1

A unit of length, 1 parsec or 1 pc = 3.085 68 x 1016 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.

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.