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一、问题提出浩瀚星空,茫茫宇宙,人类对于太空的探索从未止步。虽然高中阶段对于天体运动的分析大部分止于易于理解的理想情况,但这并不能阻止学生热衷于探索太空的心。学生提出这样一个问题:参考系的选择是任意的,我们选太阳作为参考系,认为地球是绕着太阳旋转的,选地球为参考系,那太阳应该围绕着地球旋转,相对的旋转半径和旋转周期是一样的。这意味着,若选太阳为中心天体时计算出的太阳质量和选地球为中心天体时计算出的地球质量是一样的。这是一个有趣的悖论。
First, the question raised the vast sky, the vast universe, human exploration of space has never stopped. Although the analysis of celestial movement in high school mostly ends in an easily understood ideal, this does not stop students from keenly exploring the heart of space. The student asked the question: The choice of reference frame is arbitrary, and we choose the sun as the frame of reference, thinking that the earth rotates around the sun and the earth is chosen as the reference frame. The sun should revolve around the Earth with its relative radius of rotation and rotation The cycle is the same. This means that the sun’s mass calculated when the sun is the center celestial body is the same as the earth’s mass calculated when the earth’s center celestial body was chosen. This is an interesting paradox.