Which of the following is NOT a required condition for gas and dust to begin to condense into a protostar?
A) low mutual rotation, to avoid spin-off of material from the forming star
B) low temperature, to maintain low gas pressure in the cloud
C) higher than average density, to ensure that gravitational attraction is enhanced
D) high temperature, to ensure that gas atoms and dust particles collide with sufficient energy to stick together
Correct Answer:
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