___________ in other galaxies should contain luminous O and B stars if they are like the Milky Way.
A)The halos
B)The bulges
C)The spiral arms
D)The globular clusters
E)The coronas

Question

Quizplus · Accepted Answer

Luminous O and B stars are typically found in regions of active star formation, which is most commonly found in the spiral arms of galaxies. Therefore, if other galaxies are similar to the Milky Way, their spiral arms should also contain such stars. The halo and bulge regions are typically older and more evolved, so they would not contain as many O and B stars. Globular clusters are dense collections of very old stars, so they also would not contain many O and B stars. The corona is a region of hot gas surrounding a galaxy, and is unlikely to contain many luminous stars.

___________ in Other Galaxies Should Contain Luminous O and B