A Complete Collection of 100000 Whys
Fav十万个为什么
为什么太阳升起又落下？
太阳升起又落下，是地球自转和公转共同作用的结果。主要原因包括：
1、地球自转：地球每天自西向东自转一圈，这个自转使得太阳看起来从东方升起，经过天空，然后在西方落下。地球自转一周的时间大约是24小时，这就是一天的时间长度。
2、视觉错觉：我们感觉太阳在运动，实际上是地球在自转。由于地球的自转，我们站在地球表面，看到太阳似乎在我们头顶上方移动。
3、地球公转：地球不仅自转，还围绕太阳公转。地球公转的轨道是椭圆形的，这使得太阳在天空中的路径在不同季节有所不同。在夏季，太阳在天空中的路径较高，白天较长；在冬季，太阳在天空中的路径较低，白天较短。
总结：太阳升起又落下主要是由于地球的自转和公转。地球自转使得太阳看起来从东方升起，经过天空，然后在西方落下；地球公转和自转轴的倾斜导致了季节的变化和太阳在天空中的路径变化。
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