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1 Astronomical Unit (AU) is the average distance between the earth and the sun. It is approximately 149,598,000 km.

1 light year (ly) is the distance light travels in one year. It is approximately 9,460,730,472,580 km

The other commonly used astronomical measurement is the parsec.

1 parsec (pc) is the distance at which 1 arcsecond measures 1 AU. It is approximately 3.26156 ly or 30856740079724 km.

1 arcsecond is 1/60 of a arcminute.
1 arcsecond is 1/60 of a degree.
1 degree is 1/360 of a circle.
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Lesly Jaskolski

Lvl 13
3y ago

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