Question

What is a light-year equal to?
A. the distance light travels in one year
B. the time it takes light to travel 10 trillion kilometers
C. the mean distance between the Sun and the center of our galaxy
D. the time it takes our solar system to orbit the center of our galaxy

Answer 1

Even though it has the name of a 'time' in it ('year'), a light-year
is a distance.

It's the distance that light travels in one year, in vacuum, if it
doesn't run into anything that absorbs it or slows it down.