关于高精度计算实时太阳位置的两篇文章，对于有需要的专业人士还是不错的。-High-precision calculation of real-time location of the sun on the two articles, there is a need for professionals is good.

一天文学家要确定一棵小行星的运动轨道，他在其轨道内建立了以太阳为原点的直角坐标系，由开普勒第一定律知小行星的运动轨道为一椭圆，试确定行星的运动轨道。-One day in literature to determine the orbit of an asteroid, he set up in its orbit to the sun for the origin of the coordinate system, by Kepler s first law of motion track k

计算地球非球形引力摄动，日月第三体引力以及太阳辐射压、大气阻尼等摄动-Calculation of non-spherical Earth gravitational perturbation, the moon and the third body gravitation and solar radiation pressure, atmospheric damping perturbation

天文航海计算vc实现可以通过两次测太阳高度,在通过航向航速估算天文船位()