The choices below each describe the appearance of an H-R diagram for a different star cluster. Which cluster is the youngest?
A. The diagram shows main-sequence stars of spectral types G, K, and M, along with numerous giants and white dwarfs.
B. The diagram shows main-sequence stars of all the spectral types except O and B, along with a few giants and supergiants.
C. The diagram shows main-sequence stars of every spectral type except O, along with a few giants and supergiants.
D. The diagram shows no main-sequence stars at all, but it has numerous supergiants and white dwarfs.
Answer:C
The choices below each describe the appearance of an H-R diagram for a different star cluster. Which cluster is the youngest?
A. The diagram shows main-sequence stars of spectral types G, K, and M, along with numerous giants and white dwarfs. B. The diagram shows main-sequence stars of all the spectral types except O and B, along with a few giants and supergiants. C. The diagram shows main-sequence stars of every spectral type except O, along with a few giants and supergiants. D. The diagram shows no main-sequence stars at all, but it has numerous supergiants and white dwarfs.