How sun burn without oxygen?

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It is well known to all that there is no oxygen in space and fire cannot burn without oxygen.

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So, how sun burn without oxygen?- answer is that sun cannot burn without oxygen.

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Due to the combination of an oxidants and fuel in a chemical process, fire takes place.

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So oxygen from air is generally used to initiate a flame once a match is struck.

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Due to the fusion of hydrogen atoms sun generates immense heat and light.

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So due to these light and heat sun appears to be burning.

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