To initiate star formation in a cloud, you need a __________.
A)slow contraction of a molecular cloud
B)rotating molecular cloud
C)magnetic field
D)shock

Question

Quizplus · Accepted Answer

A shock wave passing through a molecular cloud can trigger the gravitational collapse and initiation of star formation. The shock wave can come from a nearby supernova explosion, for example. The other options (A, B, and C) may be important for the subsequent evolution of the protostellar system, but they are not essential for the initial formation.

To Initiate Star Formation in a Cloud, You Need a __________