Which of the following provides evidence that the Milky Way's halo is an old system?

Question

Quizplus · Accepted Answer

The lack of gas clouds in the Milky Way's halo indicates that its star formation occurred a long time ago. The chemical composition of the halo stars also suggests that they formed in the early universe, and the HR diagrams of globular clusters show that these clusters are composed of very old stars. Therefore, all of the above provide evidence that the Milky Way's halo is an old system.

Which of the Following Provides Evidence That the Milky Way's