# How Big Is a Parsec?

## Answer

A Parsec stands for parallax of one arc second and its measurement is called megaparsec. It is the SI unit of measuring length in Astronomy. It is equal to about 3.26 light years which means protons distance in vacuum is completed over a period of 3.26 years.
Q&A Related to "How Big Is a Parsec?"
 A parsec is an astronomical measure of distance in space and is equal to 3.262 light years or 19.17 trillion miles. http://wiki.answers.com/Q/What_is_parsec_used_to_m...
 A parsec is an astronomical unit of measurement that is equivalent to 3.26 light http://www.chacha.com/question/what-is-the-measure...
 A parsec measures space: 1 unit is equivalent to 3.262 light years. Ask us anything! http://www.kgbanswers.com/what-does-a-parsec-measu...
 Hi there! Let me set the parameters for my answers first: The astronomical unit (AU or au or a.u. or sometimes ua) is a unit of length. It is approximately equal to the mean distance http://answers.yahoo.com/question/index?qid=200607...
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