Multiple choice general knowledge science & technology

Which of the following is not a binary star system?

  1. Sirius

  2. Aldebaran

  3. Antares

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

Aldebaran is a single red giant star in the constellation Taurus, not a binary system. Sirius is a binary system (Sirius A and B), Antares is a multiple star system with a companion, and Albireo is a famous visual double star system.

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