Evidence that halo population stars are older than disk population stars is that halo population stars:
A. contain dark matter.
B. are less massive.
C. have dimmer luminosities.
D. have fewer absorption lines.
Answer:D
Evidence that halo population stars are older than disk population stars is that halo population stars:
A. contain dark matter. B. are less massive. C. have dimmer luminosities. D. have fewer absorption lines.