Unit 3 Test

Match it! Select the correct answer from the pull down...Good luck!

Which object forms by the contraction of a large sphere of gases causing the nuclear fusion of lighter elements into heavier elements

In the center of every Galaxy, there is theoritcally a/an

The first step in the life cycle of a star is

Which factor does not affect a stars luminosity?

The Sun and Siruis have the same absolute magnitude, but the Sun appears much brighter because it is

Our Sun will end as a

a light year measures

Our sun will not become a black hole because it is