Johannes Kepler proposed three laws of planetary motion. Kepler described the motion of planets in a sun-centered solar system. Kepler’s efforts to explain the underlying reasons for such motions are no longer accepted; nonetheless, the actual laws themselves are still considered an accurate description of the motion of any planet and any satellite.
Kepler’s first law
The Law of Orbits: All planets move in elliptical orbits, with the sun at one focus.
In other words we can explain this as :
Planets are orbiting the sun in a path described as an ellipse.An ellipse is a special curve in which the sum of the distances from every point on the curve to two other points is a constant.The two other points are known as the foci of the ellipse.
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