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What Role Does Gravity Play In The Formation, Structure, And Their Planetary System

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Gravity plays a very major role in the formation, structure, and evolution of stars and their planetary systems. Planets are kept in their orbit around a star rather than falling into the star due to gravity and their velocity. In Earth’s case, the pull of the sun’s gravity and Earth’s velocity keeps it orbiting around the sun. The planets are traveling at a velocity that is perpendicular to the star they are orbiting. Therefore, if the star (sun) was not pulling them in using gravity, the planets would simply continue in a straight line. This is where Newton’s first law come into effect that states that an object will remain in uniform motion unless acted on by an external force. The star pulling the planets in is the external forces acting
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