这是一个OpenGL程序，在OS X的Xcode上开发，描述的是一个包含太阳、月球、地球的太阳系，太阳自转、地球公转并自转、月球公转并自转。-This is an OpenGL program developed in OS X Xcode described is the one that contains the sun, the moon, the Earth' s solar system, the sun' s rotation, the revolution of the

地球与火星坐标转换demo：适合学习从地球坐标转换成火星坐标的算法应用.-Mars coordinate transformation demo：Suitable for studying coordinates earth into Mars coordinates algorithm.