The traditional "top-down" hypothesis of the formation of our galaxy cannot explain
A)why not all globular clusters are the same age.
B)why the youngest globular clusters are in the outer halo.
C)why the oldest stars are metal poor but not completely metal free.
D)streams and rings of scattered stars in the halo.
E)All of the other choices are correct.

Question

Quizplus · Accepted Answer

The traditional "top-down" hypothesis of galaxy formation, which involves the gravitational collapse of a large gas cloud, cannot explain various observations such as the different ages of globular clusters, the location of the youngest globular clusters in the outer halo, the presence of metal-poor but not completely metal-free stars, and the streams and rings of scattered stars in the halo. Therefore, all of the other choices are correct.

The Traditional "Top-Down" Hypothesis of the Formation of Our Galaxy