What evidence do we have that the halo population of stars are older than other stars in the galaxy?
A)They are farther away.
B)They have higher masses than other stars in the galaxy.
C)They have fewer planets.
D)They have a smaller proportion of heavy elements.
E)They move slower than other stars in the galaxy.

Question

Quizplus · Accepted Answer

The Halo population of stars are known to be older because they have a smaller proportion of heavy elements, indicating that they were formed earlier in the history of the Milky Way when there were fewer heavy elements to create new stars. This is because heavy elements are produced and distributed through supernova explosions, which take time to occur and spread throughout the galaxy. Therefore, stars that formed earlier in the galaxy's history would have incorporated lower proportions of heavy elements from previous generations of stars.

What Evidence Do We Have That the Halo Population of Stars