Interstellar gas clouds may collapse to form stars if they
A) have very high temperatures.
B) encounter a shock wave.
C) rotate rapidly.
D) are located near main sequence spectral type K and M stars.
E) all of the above.

Question

Quizplus · Accepted Answer

Interstellar gas clouds can collapse to form stars if they encounter a shock wave, which can trigger the collapse by compressing the gas and increasing its density. High temperatures and rapid rotation can also contribute to star formation, but they are not necessary conditions. The presence of K and M stars nearby may affect the environment of the gas cloud, but it is not a direct cause of star formation.

Interstellar Gas Clouds May Collapse to Form Stars If They