Multiple Choice
A spiral (S or SB) galaxy contains
A) mostly lower-main-sequence stars and giants.
B) mostly upper-main-sequence stars and giants.
C) mostly upper-main-sequence stars and gas and dust.
D) upper- and lower-main-sequence stars and gas and dust.
E) mostly white dwarfs and supergiants.
Correct Answer:
Verified
Correct Answer:
Verified
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