Multiple choice

Which is the closest star to the Sun?

  1. Sirius

  2. Alpha Centauri

  3. Mercury

  4. Proxima Centauri

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Proxima Centauri is the closest star to our solar system, located about 4.24 light-years away. It is part of the Alpha Centauri star system.