Agenda Today 1 Kepler's Laws 2 Newton's Law of gravity 3 gravitational field and potential energy 4 Einstein's theory of gravity
Agenda Today 1 Kepler’s Laws 2 Newton’s Law of gravity 3 gravitational field and potential energy 4 Einstein’s theory of gravity
天何所沓?十二焉分? 日月安属?列星安陈? Sphere of the Fixed Stars Celestial Region Sphere of the Moon (Terrestrial Region) Fire A标 Water
天何所沓?十二焉分? 日月安属?列星安陈?
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