Five stars and their spectral types are given below. Which star would have the lowest surface temperature
A)α For; F8
B)ο Cet; M7
C)35 Ari; B3
D)γ Tri; A0
E)ξ Per; O7

Question

Quizplus · Accepted Answer

The spectral types of stars are arranged in the sequence OBAFGKM, where O type stars are the hottest and M type stars are the coolest. Therefore, the star with the spectral type M7 (ο Cet) would have the lowest surface temperature.

Five Stars and Their Spectral Types Are Given Below