Multiple choice general knowledge

What are Alpha Centauri and Sirius?

  1. Stars

  2. Planets

  3. Sattelites

  4. Mountains on Mars
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alpha Centauri (nearest star system to Earth) and Sirius (brightest star in night sky) are both stars. They are not planets, satellites, or Martian features. Sirius is a binary star system 8.6 light-years away; Alpha Centauri is a triple-star system 4.4 light-years distant.

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