What is the lifetime on the main sequence of a 2 solar mass star compared to the approximately 10 billion year life of our Sun? Pick the best answer.
A) 1.8 10 11 years
B) 1.8 10 10 years
C) 1.8 10 9 years
D) 1.8 10 6 years
E) 1.8 10 3 years

Question

Quizplus · Accepted Answer

A 2 solar mass star has a shorter main sequence lifetime than the Sun because it burns its nuclear fuel more quickly. The lifetime is approximately 1.8 billion years (1.8 x 10^9 years).

What Is the Lifetime on the Main Sequence of a 2