What is the common trait of all main-sequence stars?
A. They are in the final stage of their lives.
B. They generate energy through hydrogen fusion in their core.
C. They are all spectral type G.
D. They all have approximately the same mass.
Answer:B
What is the common trait of all main-sequence stars?
A. They are in the final stage of their lives. B. They generate energy through hydrogen fusion in their core. C. They are all spectral type G. D. They all have approximately the same mass.