Gravity plays a crucial role in the formation of our Sun and planets primarily by pulling gas and dust together. Here's a breakdown of the relevant points:
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Gravity pulls gas and dust together to form the sun and planets: This is the most accurate statement. The solar system began as a large cloud of gas and dust in space, known as a solar nebula. When this cloud began to collapse under its own gravity, it led to the formation of the Sun at the center and the planets in the surrounding disk.
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Gravity creates heat and light in the sun: While gravity itself doesn't directly create heat and light, it plays an essential role in the process of nuclear fusion in the Sun. As gravity pulls matter together, the pressure and temperature increase in the core, eventually leading to the fusion of hydrogen into helium, which produces the heat and light we see.
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Gravity repels gas and dust away from the sun: This statement is not accurate. Instead, gravity attracts gas and dust toward the Sun, preventing them from escaping into space.
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Gravity causes the sun and planets to rotate: While gravity is involved in the dynamics of the solar system, the rotation of the Sun and planets is primarily a result of the conservation of angular momentum from the original rotating solar nebula.
In summary, the most direct role of gravity in the formation of the Sun and planets is through pulling together gas and dust to create these celestial bodies.
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