i heard the sun runs on fuel what fuel does it have
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The Sun's source of energy is fusing hydrogen. Later in its life, it will fuse helium. The Sun is too small of a star to explode. Instead, it will go through a red giant phase, throw off a planetary nebula and finally run out of its ability to fuse atoms at an age of about 12 billion years (about 7 billion years from now) and then gradually cool off over many trillions of years.
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The Sun turns hydrogen into helium through nuclear fusion. It has about 5 billion years of hydrogen left. But it's not going to explode when it runs out - the Sun is far too small to explode. It will turn into a red giant star, and eventually a planetary nebula.
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It uses thermonuclear fusion in its core to transform matter into copious amounts of energy. Mainly fusing hydrogen the Sun's output of matter is about 5 billion tons per minute.
It will never explode, but it will end its life in about 5 billion years.
It will never explode, but it will end its life in about 5 billion years.
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The Sun is never going to explode: it doesn't have enough mass. It is converting hydrogen into helium and has enough to continue for another 5 billion years.