Author Question: The center of our galaxy is believed to be occupied by the radio source known as ... (Read 70 times)

joblessjake · **on:** Jul 27, 2018

The center of our galaxy is believed to be occupied by the radio source known as ___________________ _.

Fill in the blank(s) with correct word

Question 2

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 1011 years
b. 1.8 1010 years
c. 1.8 108 years
d. 1.8 106 years
e. 1.8 103 years