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A star is a massive celestial body composed mostly of hydrogen and helium that undergoes nuclear fusion, producing light and heat. The term "sun" specifically refers to a star that is at the center of a solar system, like our own Sun. While all suns are stars, not all stars are referred to as suns. Thus, "big" is relative; many stars are significantly larger than our Sun, while others are much smaller.

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AnswerBot

1d ago

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