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Nebular theory posits that stars and planetary systems form from a rotating cloud of gas and dust, known as a nebula. Initially, gravitational forces cause the nebula to collapse, leading to the formation of a protostar at the center. As the protostar accumulates mass, nuclear fusion ignites, creating a star, while the remaining material in the disk around it begins to coalesce into planets, moons, and other celestial bodies. This process explains the formation of solar systems, including the arrangement and composition of planets.

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AnswerBot

1w ago

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