Because the definition of a lightyear is: how long light can travel in a year. Hope this helped;)
a lightyear
100km is a distance, not a measurement of time. (kilometres)
Accurate measurements of time become possible after accurate measurement of length and mass because time taken by a heavy body to move a certain distance is more,and time taken by a light body to move a certain distance is less.
Measurement always deals with a distance of a line or a distance between to objects, distance between 2 points, and so on.
A minute is a measurement of time. A light minute is a measurement of distance. it's the distance light would travel in one minute. (That's about 10 million miles!)
Yes.
A lightyear is a unit of distance, not time. It represents the distance that light can travel in one year, which is about 5.88 trillion miles.
a mega lightyear
Lightyear isn't about time, it's distance. One lightyear is ten trillion kilometers.
A lightyear is a much larger distance.
a lightyear
"Lightyear" is a noun. It is a unit of distance used to measure interstellar space.
None, a furlong is a measurement of distance, and a year is a measurement of time.
Hour = measurement of time. Miles = measurement of distance.
100km is a distance, not a measurement of time. (kilometres)
a Lightyear, around 1013 kilometres.
buzz lightyear (FTW!)