Kepler's laws The law of orbit:All planets move in elliptical with the sun at one focus The Law of area:A line joining any planet to the sun sweeps out equal areas in equal times vdt Planet 11
Kepler’s laws The law of orbit: All planets move in elliptical with the sun at one focus The Law of area: A line joining any planet to the sun sweeps out equal areas in equal times
Angular momentum(角动量) L=rxp The law of period: the square of the period of any planet is proportional to the cube of the planet's mean distance from the sun. T R
Angular momentum（角动量）: The law of period: the square of the period of any planet is proportional to the cube of the planet’s mean distance from the sun
Newton's Law of gravity: G RR / G:gravitational constant
Newton’s Law of gravity: G： gravitational constant