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Generally Speaking, How Does the Surface Temperature and Luminosity of a Protostar

Question 5

Multiple Choice

Generally speaking, how does the surface temperature and luminosity of a protostar compare to the surface temperature and luminosity of the main-sequence star it becomes?


A) A main-sequence star is hotter and dimmer than it was as a protostar.
B) A main-sequence star is hotter and brighter than it was as a protostar.
C) A main-sequence star is cooler and dimmer than it was as a protostar.
D) A main-sequence star is cooler and brighter than it was as a protostar.

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