define astronomical unit, light year and parsec
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light year is the distance travelled by light in 1 year.
parsec is distance from where the semi major axis of earth subtends an angle of 1 sec.
sorry I don't know about the 1st
hope this helps
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parsec is distance from where the semi major axis of earth subtends an angle of 1 sec.
sorry I don't know about the 1st
hope this helps
plz Mark it as brainliest if u liked it
helpme54:
plz Mark it as brainliest if u liked it
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1. average distance between the earth and the sun.
2. distance travelled by light in vaccuum in 1 year.
3. the distance at which a star would have annual parallax of 1 second of arc
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