Planetary-problems
于 2015-04-20 发布
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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 known asteroid is an ellipse, the orbits of planets.)
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