Question

Which type of stars have the highest luminosity?

A. main sequence

B. blue giants

C. red super giants

D. BOTH blue giants and red super giants​

Answer 1

Answer: Red supergiant.

Explanation:

The stars in group C are even more luminous than the giants. These are super giants, the largest of stars with extremely high luminosisties. A red supergiant such as Betelguese would extend beyond the orbit.