UNIVERSE
SOLAR SYSTEM FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Its heating up due to contraction.
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Its heating up due to nuclear fusion.
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Its heating up because it’s a star.
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It stops heating up and disintegrates.
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Detailed explanation-1: -The protostar continues to contract and heat up until the fusion rate balances the energy radiated away. When this balance is struck, contraction stops and the star settles onto the main sequence. Photons exert a slight amount of pressure when they strike matter.
Detailed explanation-2: -So, in the developing stage when it is called a protostar there is not sufficient heat energy for the fusion reaction to occur. Thus, a protostar will not engage in the process of nuclear fusion. When it becomes hot enough then fusion starts and it becomes a main-sequence star.
Detailed explanation-3: -When the force of gravity pulling in on the cloud is greater than the strength of internal pressure pushing out, the cloud collapses into a protostar.
Detailed explanation-4: -Stage 2: Protostar. As a gas clump collapses it heats up because the gas particles run into each other. The energy the gas particles had from falling under the force of gravity gets converted to heat energy. The gas clump becomes warm enough to produce a lot of infrared and microwave radiation.