Classifying stars by spectral type is the same as categorizing them by
A) mass.
B) temperature.
C) radius.
D) age.

Question

Quizplus · Accepted Answer

Classifying stars by spectral type primarily categorizes them based on their temperature. The spectral classification system, which ranges from O, B, A, F, G, K to M, with O being the hottest and M the coolest, is a method to categorize stars based on their surface temperature, which also affects their color and spectral characteristics.

Classifying Stars by Spectral Type Is the Same as Categorizing