Classical Explenation on How The Sun keeps Shining

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Quantum tunneling is essential to understanding how the Sun continues to shine, as classical physics fails to explain the prolonged energy production over 4.6 billion years. The temperature within the Sun is not sufficient for protons to collide and fuse through classical means, necessitating a quantum mechanical explanation. While some suggest the Sun could be likened to a giant ball of smoldering coal, this analogy only accounts for a short-term energy source, not the long-term stability observed. Current theories highlight that without quantum mechanics, a successful explanation for the Sun's sustained luminosity remains elusive. Thus, quantum tunneling is crucial for reconciling the Sun's energy output with its age.
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Is Quantum Tunneling necessary to explain why The Sun keeps shining , due to it not being hot enough to provide the necessary energy for protons to collide?
 
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There is no classical explanation on how is shining and has been shining for 4.6 billion years. The only way to explain that is through quantum mechanics.
 
Well, there's no *sucessful* explanation. The best one I know of is that it's a giant ball of smoldering coal. It gets the temperature and appearance right (assuming there's a lot of oxygen available) but only allows it to burn for a few thousand years.
 
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