The flat rotation curves of spiral galaxies tell us that they ...

[@Brianna17]

The flat rotation curves of spiral galaxies tell us that they contain a lot of dark matter. Do they tell us anything about where the dark matter is located within the galaxy?
 
  A) Yes, they tell us that dark matter is concentrated near the center of the galaxy.
  B) Yes, they tell us that dark matter is spread uniformly throughout the galactic disk.
  C) Yes, they tell us that dark matter is spread throughout the galaxy, with most located at large distances from the galactic center.
  D) No, we cannot determine anything about the location of dark matter from the rotation curve.

Question 2

All the following types of objects are found almost exclusively in the disk (rather than the halo) of the Milky Way except
 
  A) young stars.
  B) globular clusters.
  C) X-ray binaries.
  D) high-mass, red supergiant stars.

[brittiany.barnes]

Answer to Question 1

C

Answer to Question 2

B

[@Brianna17]

TYSM

[Laurenleakan]

Excellent