蓝天其实是地球大气层中散射阳光形成的现象|地球|大气层|太空|对流层|蓝天

“蓝天有多高”这个问题可以从不同角度理解：

大气层高度

蓝天其实是地球大气层中散射阳光形成的现象。地球大气层大约有100公里厚度，主要分为对流层、平流层、中间层、热层和散逸层。我们看到的蓝天主要是对流层和平流层的部分，大约从地面到10-50公里高空。

视觉感受上的“高度”

蓝天给人的感觉是无边无际，没有明确的“高度”界限。因为大气分布是连续的，随着高度增加空气越来越稀薄，蓝色也会逐渐变淡，最终在高空（大约100公里以上）变成黑色的太空。

总结：

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