Question

Define and derive 1 Parsec.Also find its relation with light year.
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Answer 1

Answer:

A parsec (symbol: pc) is a unit of length used to measure large distances to objects outside our Solar System. One parsec is the distance at which one astronomical unit subtends an angle of one arc second. A parsec is equal to about 3.26 light-years(31 trillion kilometres or 19 trillion miles) in length.