How would you expect a star that formed recently in the disk of the galaxy to differ from one that formed early in the history of the disk?
A)It should be higher in mass.
B)It should have a higher fraction of elements heavier than hydrogen and helium.
C)It should be much brighter.
D)It should orbit the galactic center at a much higher rate of speed.
E)All of the above would be expected.

Question

Quizplus · Accepted Answer

Stars that form later in the disk of the galaxy have the advantage of being formed from gas that has been enriched by heavier elements from previous generations of stars. This means that a recently formed star in the disk of the galaxy should have a higher fraction of elements heavier than hydrogen and helium compared to a star that formed early in the history of the disk.

How Would You Expect a Star That Formed Recently in the Disk