In an H-R diagram, where can you see the spectral type of a star (whether it is an O type star or a G type star, for example)?
A) along the right (vertical axis)
B) along the bottom (the horizontal axis)
C) only in the red giant region
D) only on the main sequence
E) H-R diagrams have nothing to say about spectral types

Question

Quizplus · Accepted Answer

The spectral type of a star, which ranges from O (hot) to M (cool), is typically plotted along the horizontal axis of an H-R (Hertzsprung-Russell) diagram. This axis represents the surface temperature of the stars, which correlates with their spectral types.

In an H-R Diagram, Where Can You See the Spectral