If the distance to a star is 450 light-years, what can we conclude about the star?
A) The star is 450 million AU away.
B) The star's light takes 450 years to reach us.
C) The star must have formed 450 billion years ago.
D) The star must be very young.

Question

Quizplus · Accepted Answer

The distance in light-years indicates how long light from the star takes to reach us. Since a light-year is the distance light travels in one year, a star that is 450 light-years away means its light takes 450 years to reach Earth.

If the Distance to a Star Is 450 Light-Years, What