Multiple choice

Which of these is NOT a star?

  1. Sirius

  2. Phobos

  3. Proxima Centauri

  4. the Sun

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

Phobos is one of the two moons of Mars, not a star. The Sun is a star, and Sirius and Proxima Centauri are stars located outside our solar system.