camiyadelk camiyadelk

13-09-2017
Geography

contestada

Define light- year and explain how and why light- years are used to measure distances in the universe

Relax

Respuesta :

13-09-2017

A unit of astronomical distance equivalent to the distance that light travels in one year .....and because it is the fastest way to measure in a very long distances for example earth to other far away planets

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