Question

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✒Define:
✏1) astronomical unit and its uses.
✏2) parsec

Answer 1

1. An Astronomical Unit (AU) is the average distance between Earth and the Sun, which is about 93 million miles or 150 million kilometers.
Astronomical units are usually used to measure distances within our Solar System.

2. A parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond, which corresponds to648000π astronomical units. One parsec is equal to about 3.26 light-years in length.

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Answer 2

Hey buddy ☺

1)First of all astronaumical unit is a type of length which defines the mean or average distance between Sun and Earth.. It is approximately 93 million miles or 150million kilometers
Uses:- It's helpful in measuring the distance of heavenly objects from one to another...

2)Basically, it's a unit of length used to measure the astronomically large distances between objects beyond our Solar System. One parsec is the distance at which one astronomical unit subtends an angle of one arcsecond.


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