What proportion of visible stars in our nighttime sky are members of multiple-star systems,such as binary stars?
A) less than 1%
B) 2/3, or almost 70%
C) only about 1/4, or 25%
D) close to 100%

Question

Quizplus · Accepted Answer

Studies have estimated that approximately 2/3 or almost 70% of visible stars in our nighttime sky are members of multiple-star systems, such as binary stars.

What Proportion of Visible Stars in Our Nighttime Sky Are