Multiple choice

What units measure the distance between stars?

  1. miles

  2. light years

  3. kilometers

  4. acres
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Distances in space are so vast that everyday units like miles or kilometers are too small to be practical. Astronomers use light-years, which is the distance light travels in one year (about 5.88 trillion miles).

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