A star of spectral type O lives approximately how long on the main sequence?
A) 1,000 years
B) 10,000 years
C) 10 million years
D) 100 million years
E) 1 billion years
Answer: C
A star of spectral type O lives approximately how long on the main sequence?
A) 1,000 years
B) 10,000 years
C) 10 million years
D) 100 million years
E) 1 billion years
Answer: C