You measure the heavy element abundances and motions of stars near the Sun.When plotting your data, you find that the stars separate into two distinct groups, which you label A and B.Group A has velocities and heavy-element abundances similar to the Sun's, while Group B has high velocities and low heavy-element abundances.These groups are, respectively, in which two stellar components of the Milky Way?

Question

Quizplus · Accepted Answer

Group A, with velocities and heavy-element abundances similar to the Sun's, is part of the disk, while Group B, with high velocities and low heavy-element abundances, is part of the halo.

You Measure the Heavy Element Abundances and Motions of Stars