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月亮为什么晚上会发光
更新时间: 2020-10-27 00:00:00  

月亮是反射太阳的光而被人看到的。月亮不是恒星,本身不能发光,但月亮能反射太阳光。虽然月亮反射的光只有百分之七能到达地球,但足够照亮地球上的黑夜。月球亮度随日月间角距离和地月间距离的改变而变化,满月时的亮度比上下弦要大十多倍。

关键词: 月亮 为什么 晚上 发光

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