Multiple Choice
A typical protostar may be several thousand times more luminous than the Sun. What is thesource of this energy?
A) chemical combustion of hydrocarbons
B) nuclear fusion in its core
C) from the release of gravitational energy as the protostar continues to shrink
D) the ionization of the gas as it heats up
E) from nearby hot stars or supernovae that have initiated the star formation process
Correct Answer:
Verified
Correct Answer:
Verified
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