Very briefly:
His first law: 1.The orbit of every planet is an ellipse with the Sun at one of the two foci.
States that the orbit of planets is NOT circular as previously thought.
His second law: 2.A line joining a planet and the Sun sweeps out equal areas during equal intervals of time.
States that (when the mathematics is probed) the orbital period of a planet depends hardly at all on the mass of the planet.
Go to http://en.wikipedia.org/wiki/Kepler's_laws_of_plan... and look towards the botton of the page under "Derivation from Newtons laws"
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Verified answer
Very briefly:
His first law: 1.The orbit of every planet is an ellipse with the Sun at one of the two foci.
States that the orbit of planets is NOT circular as previously thought.
His second law: 2.A line joining a planet and the Sun sweeps out equal areas during equal intervals of time.
States that (when the mathematics is probed) the orbital period of a planet depends hardly at all on the mass of the planet.
Go to http://en.wikipedia.org/wiki/Kepler's_laws_of_plan... and look towards the botton of the page under "Derivation from Newtons laws"