According to Newton, the gravity of the is needed to explain planetary orbits.

Question

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According to Newton's law of universal gravitation, the gravity of the Sun is needed to explain the elliptical orbits of the planets around it. This law states that every point mass attracts every other point mass by a force acting along the line intersecting both points. The force is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

According to Newton, the Gravity of the Is Needed to Explain