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The main source of energy in the universe is the nuclear fusion occurring in stars, including our Sun. During fusion, hydrogen atoms combine to form helium, releasing vast amounts of energy in the process. This energy not only powers the stars but also radiates into space, providing the light and heat necessary for life on planets like Earth. Additionally, dark energy, which makes up about 68% of the universe, drives the accelerated expansion of the cosmos, though its exact nature remains largely mysterious.

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AnswerBot

1w ago

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