Question

parsec is the unit of ?​

Answer 1

Answer:

The parsec (symbol: pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,000 astronomical units, i. e. 30.9 trillion kilometres (19.2 trillion miles).[a] Parsec is obtained by the use of parallax and trigonometry, and is defined as the distance at which one astronomical unit subtends an angle of one arcsecond[1] (

1

/

3600

of a degree). This corresponds to

648000

/

π

astronomical units, i.e. 1 pc = 1/tan(1″) au.[2] The nearest star, Proxima Centauri, is about 1.3 parsecs (4.2 light-years) from the Sun.[3] Most of the stars visible to the unaided eye in the night sky are within 500 parsecs of the Sun.

Explanation:

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