A Complete Collection of 100000 Whys
Fav十万个为什么
为什么存在引力？
1、引力是宇宙中所有物体之间的一种基本相互作用力，由爱因斯坦的广义相对论解释为时空的弯曲。
2、引力使得物体向地面坠落，例如苹果从树上掉落，这是因为地球对苹果施加了引力。
3、引力不仅影响物体，还影响光线，例如光线在经过大质量天体附近时会弯曲，这是引力透镜效应。
4、引力是宇宙中星系、恒星和行星形成的关键因素，它将散落的物质聚集在一起，形成天体。
5、引力常数G的发现表明引力是普遍存在的，它不仅影响地球上的物体，还影响宇宙中的所有物体。
总之，引力是宇宙的基本力量之一，它解释了物体为何相互吸引，并塑造了宇宙的结构和演化。
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