One light-year is a distance of approximately:
A) 6.3 × 10⁴ km.
B) 3 × 10⁵ km.
C) 9.5 × 10¹² km.
D) 1.5 × 10⁸ km.

Question

Quizplus · Accepted Answer

A light-year is defined as the distance that light travels in one year, which is approximately 9.5 × 10¹² km. Therefore, option C is the correct answer. Options A and B are much smaller distances, whereas option D is about 1/60th the actual value of a light-year.

One Light-Year Is a Distance of Approximately