A Complete Collection of 100000 Whys
Fav十万个为什么
为什么行星会自转？
1、行星自转是由于形成时的角动量守恒。在行星形成过程中，尘埃和气体云在引力作用下聚集，旋转速度逐渐增加，最终形成自转。
2、行星自转受到太阳和其他行星的引力影响，但这些引力主要导致行星轨道运动，而不是改变其自转速度。
3、自转速度与行星的质量和半径有关，质量大、半径小的行星自转速度通常更快，如木星。
4、地球的自转是由于早期太阳系形成时的碰撞和引力相互作用，这些事件赋予了地球初始的自转速度。
5、自转产生了昼夜交替现象，使得行星表面温度变化，对生命形成和演化有重要影响。
总之，行星自转是形成时的角动量守恒、引力作用、质量分布和早期碰撞等多种因素共同作用的结果，对行星的气候、生命和宜居性有深远影响。
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