Author Question: What is the lifetime of a star of 0.1 solar masses and a luminosity of 0.01 that of the Sun? Assume ... (Read 41 times)

tingc95 · **on:** Jul 27, 2018

What is the lifetime of a star of 0.1 solar masses and a luminosity of 0.01 that of the Sun? Assume the lifetime of the Sun is 10 billion years.

A) 10 billion years
B) 100 billion years
C) 10 trillion years
D) 10 million years
E) This star will never start hydrogen fusion reactions because it is not massive enough.

Question 2

As of the time of the publication of the textbook, how many planets have been discovered using the Doppler method?

A) 700 B) 7000 C) 70 D) 7