Question

question 3
1 pts
the o and b stars in our galaxy are located________.
o in the disk but not the halo.
o in neither the halo nor the disk.
o in the halo but not in the disk.
o in both the halo and the disk.

Explanation:

O and B stars are massive, hot, and luminous stars. They have short lifetimes (in the order of millions of years). The disk of the galaxy has regions with active star - formation (due to the presence of gas and dust). The halo consists of old, low - mass stars and globular clusters. Since O and B stars are young (formed recently in regions of active star - formation), they are located in the disk (where star - formation is currently occurring) and not in the halo (which has no active star - formation and contains old stars).

Answer:

in the disk but not the halo.