Respuesta :

monsourboys2

Answer:

The astronomical unit is used primarily for measuring distances within the Solar System or around other stars. It is also a fundamental component in the definition of another unit of astronomical length, the parsec.

This answer is 100% correct. I agree

Explanation:
I just learned this so... a light year is a unit of measurement used in space. They use light years because space is too big and if we used our earth measurements the numbers would be far too big