Author Question: The rotation curve of the galaxy provides evidence for the existence of the ____________________ ... (Read 83 times)

APUS57 · **on:** Jul 27, 2018

The rotation curve of the galaxy provides evidence for the existence of the ___________________ _ which extends beyond the halo of the galaxy.

Fill in the blank(s) with correct word

Question 2

The H-R diagram of a young star cluster shows

a. that high-mass stars have not yet reached the main sequence yet.
b. that low-mass stars have not yet reached the main sequence yet.
c. mainly giant stars.
d. no stars since none have reached the main sequence yet.