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Fav十万个为什么
为什么行星围绕恒星转？
1、行星围绕恒星转是由于万有引力。恒星的质量远大于行星，产生的引力足以将行星束缚在其轨道上。
2、行星的运动遵循开普勒定律，即行星围绕恒星的运动轨迹是椭圆形，恒星位于椭圆的一个焦点上。
3、行星的初始速度和恒星引力之间的平衡决定了其轨道形状。如果速度过慢，行星会坠入恒星；如果速度过快，则会逃离恒星。
4、行星的轨道运动是能量守恒的结果。行星在靠近恒星时速度加快，远离恒星时速度减慢，但总能量保持不变。
5、行星之间的引力也会影响彼此的轨道，但总体上，恒星对行星的引力是主导因素。
总之，行星围绕恒星转是由于恒星强大的引力作用，以及行星在初始速度和引力平衡下的轨道运动，这一现象解释了宇宙中行星系统的稳定性和规律性。
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