Which sequence correctly lists the spectral classes of stars in order of decreasing temperature (from hottest to coolest)?
A) A B F G K M O
B) O A B G F M K
C) A F O B M G K
D) O B A F G K M

Question

Quizplus · Accepted Answer

The spectral classes of stars go in order from hottest to coolest as O, B, A, F, G, K, M. Therefore, option D correctly lists the spectral classes in the correct order of decreasing temperature.

Which Sequence Correctly Lists the Spectral Classes of Stars in Order