Our current ideas on galaxy formation suggest that the visible parts of galaxies:
A) form first and are incorporated into dark matter halos later
B) form only in the densest parts of dark matter halos
C) can tell you the total size of the dark matter halo
D) can tell you everything about the formation history of that galaxy
E) spread out over larger distances than dark matter halos

Question

Quizplus · Accepted Answer

Visible parts of galaxies form in the densest regions of dark matter halos where gas can cool and condense to form stars.

Our Current Ideas on Galaxy Formation Suggest That the Visible