The approximate main-sequence lifetime of a star of spectral type O is
A. 10,000 years.
B. 3 million years.
C. 300 million years.
D. 10 billion years.
Answer:B
The approximate main-sequence lifetime of a star of spectral type O is
A. 10,000 years. B. 3 million years. C. 300 million years. D. 10 billion years.