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Kepler' s Three laws ​

Answer»

There are ACTUALLY three, Kepler's laws that is, of planetary motion: 1) every planet's orbit is an ELLIPSE with the Sun at a focus; 2) a line joining the Sun and a planet sweeps out EQUAL AREAS in equal times; and 3) the square of a planet's orbital period is proportional to the cube of the semi-major axis of its



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