NSEA · Stellar Astronomy Basics · Quiz
5 real NSEA questions on Stellar Astronomy Basics. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.
Question 1 of 5
HARDA binary star system has two stars of masses M₁ = 2M☉ and M₂ = 1M☉ orbiting their common center of mass. If the total separation between the stars is 9 AU, what is the orbital period of the system in years?