All of these are possible mechanisms believed to be capable of triggering the collapse of a cloud of gas and dust to form stars EXCEPT
A) stellar winds may compress nearby gas and dust clouds.
B) a nearby supernova can compress nearby gas and dust clouds.
C) clouds can collide and compress each other.
D) radiation pressure from the cosmic microwave background can compress clouds of gas and dust.

Question

Quizplus · Accepted Answer

Radiation pressure from the cosmic microwave background is not strong enough to compress clouds of gas and dust to trigger their collapse into stars. The cosmic microwave background is the afterglow of the Big Bang and is too diffuse to exert significant pressure on gas and dust clouds.

All of These Are Possible Mechanisms Believed to Be Capable