利用opengl实现一个小型太阳系的运动，可以通过键盘控制地球的自转和公转，d逆时针自传，D顺时针自转，y逆时针公转，Y顺时针公转-use opengl achieve a small movement of the solar system, Keyboard control through the Earth's rotation and revolution, d counterclockwise autobiography, D clockwise rotation, y pare revolution, Y clockwise revolution