Question

problem 37
a light - year is
the distance that light travels in one year.
the time it takes earth to orbit around the sun.
the time it takes light to travel between the sun and the furthest planet.
the distance between the sun and the next star.
the time it takes a beam of light to go completely around the earths orbit.
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Explanation:

A light - year is a unit of distance in astronomy. It is defined as the distance that light travels in a vacuum in one year. The speed of light is constant in a vacuum, and multiplying this speed by the number of seconds in a year gives the distance of a light - year.

Answer:

the distance that light travels in one year.