Which process is required to allow a gravitationally-collapsing gas cloud to continue to collapse?
A) The cloud must radiate much of its thermal energy.
B) The cloud must trap most of its thermal energy.
C) The cloud must collide with other clouds.
D) New dust particles must continually be made in the cloud.

Question

Quizplus · Accepted Answer

The cloud must radiate much of its thermal energy in order for it to cool and maintain a high density. If it traps most of its thermal energy, the gas will not cool down enough to continue collapsing. Collisions with other clouds or the creation of new dust particles may provide triggers for collapse, but they are not required for the process to continue.

Which Process Is Required to Allow a Gravitationally-Collapsing Gas Cloud