Question

The distance between stars and the Earth is measured in______.
1. meters
2. light year
3. kilometers
4. mega units

Answer 1

Correct Answer - Option 2 : light year

The correct answer is light year.

• A light-year is a measurement of distance and not time.

• The distance between stars and the Earth is measured in a light-year.
• A light-year is a distance that the light travels in one year. It is equal to 9.461 x 1012 km.
• As defined by the International Astronomical Union (IAU), a light-year is a distance that light travels in a vacuum in one Julian year i.e. 365.25 days.
• Thus, a light-year is most often used when expressing distances to stars.