First Law: The path of each planet around the sun is an ellipse with the sun at one focus. An ellipse is defined as a closed curve such that.
PF1 + PF2 = CONSTANT for point P.
Second Law: Each planet moves such that an imaginary line drawn from the sun to the planet sweeps out equal areas in equal time intervals.
Third Law: The ratio of the squares of the periods (T) of any two planets
revolving around the sun is equal to the ratio of the cubes of their mean
distances (r) from the sun.