What can cause a galactic fountain?
A)winds and jets from newly-formed protostars
B)a supernova occurring in the halo
C)multiple supernovae occurring together
D)the combined effect of spiral density waves
E)molecular clouds falling towards the galactic center

Question

Quizplus · Accepted Answer

A galactic fountain is caused by the ejection of gas and dust from the surface of a galaxy by supernovae explosions. In the case of multiple supernovae occurring together, the resulting force is strong enough to propel gas and dust out of the galaxy's disk and into the halo, where it can mix with other material and eventually fall back down to the disk in what is known as a galactic fountain.

What Can Cause a Galactic Fountain