An Analysis and Design of the Preparation Orbit for the Lunar Satellite

On the basis of the moon as regular sphere approximately, establish fixed coordinate system of the moon, In the condition of the least energy consumption, collecting information furthest, landing on the landing point precisely and so on, found the astronomy model which is based on geometric area. Meanwhile, combined with the direction and cycle of the moon's Autobiography, as well as the formula of universal gravitation etc, analyze and design the preparation orbit, then work out the related parameters.