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Which force is most important inside stars?
Quick Answer
Gravity is crucial inside stars because it compresses matter and creates the pressure needed for fusion. Nuclear fusion then releases the energy that makes stars shine.
The Full Story
A star is balanced by a tug-of-war between gravity pulling inward and pressure from fusion pushing outward. Gravity is the force that compresses gas and dust into a protostar and keeps the star hot and dense enough for nuclear fusion. In the core, the strong and weak forces enable the reactions that turn hydrogen into helium. Without gravity, stars would never form; without nuclear forces, they could not shine.
Key Facts
1.Stars are held together by gravity
2.Fusion in stellar cores depends on the strong and weak nuclear forces
3.The Sun’s core temperature is about 15 million °C
YouTube Angle
Suggested video title for this topic:
"Why stars need gravity to shine"
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