What evidence suggests that the protogalactic cloud that formed the Milky Way resulted from several collisions among smaller clouds?
A)The stars in the halo of the Milky Way are organized into several dense clusters arranged throughout the halo.
B)The Milky Way resembles an elliptical galaxy more than other spirals do.
C)Halo stars differ in age and heavy-element content,but these variations do not seem to depend on the stars' distance from the galactic center.
D)The bulge of the Milky Way is surrounded by many globular clusters,just as elliptical galaxies are.
E)The Milky Way is the central galaxy of a cluster of galaxies.

Question

Quizplus · Accepted Answer

C) The variations in age and heavy-element content among halo stars, without a clear dependence on their distance from the galactic center, suggest that these stars originated from different protogalactic clouds. This diversity is consistent with the idea that the Milky Way formed from the merging of several smaller clouds, each contributing stars with different characteristics.

What Evidence Suggests That the Protogalactic Cloud That Formed the Milky