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Abstract
Using Newton's law of gravitational force (gravity is inversely proportional to distance square)£¬this paper establishes the orbit equation of planet and gets the Kepler' Law£®This paper also proves that the Chang'e-1 is elliptical in the process of running around the Earth and the orbit of he Chang'e-1 is also elliptical in the process of running around the Moon£®This paper briefly describes the Chang'e-1 lunar exploration process and the main mathematical and physical principles of Chang'e-1 in the process of flight£®In the course of the lunar exploration Chang'e-1 conducts an Apogee track of changing£¬three times tracks of changing in near locations£¬three brakes around the moon£®
Key words£ºelliptic£»orbit£»gravitational force£»Kepler' Law