All of the Sun shines. Or at least the outside, if that's what you mean.
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The process of combustion involves rapid oxidation reactions that require the presence of oxygen. In the core of the sun, where nuclear fusion occurs, there is no oxygen present. Instead, the sun produces energy through the fusion of hydrogen nuclei into helium, releasing large amounts of energy in the process.
SUN A DOY for light
Since the sun (a star) is so bright, no other star can shine during the daytime.
The sun does not shine in the night. The full moon reflects sunlight to the Earth at night.
The element that creates the energy that causes the sun to shine is hydrogen. Through a process called nuclear fusion, hydrogen atoms in the sun's core combine to form helium, releasing vast amounts of energy in the form of light and heat.