This relationship between the period of an orbit, T, and its orbital radius, r, in which the square of the orbital period is proportional to the cube of the orbital radius, was discovered by the Germa...This relationship between the period of an orbit, T, and its orbital radius, r, in which the square of the orbital period is proportional to the cube of the orbital radius, was discovered by the German astronomer Johannes Kepler (1571 - 1630). Figure A.7.4: The distance (r) between the center of the Earth and a satellite is a combination of the height of the satellite above Earth's surface (h) and the radius of the Earth (R E ).
