From Wikipedia, the free encyclopedia
月相,是由地球上所观看个月光形态。月球本身不发光,月球直接被太阳照射之部分反射太阳光,才可见发亮,渠个阴影部分是月球自家个阴暗面。根据天文学,月球环绕地球公转时,地球、月球、太阳个相对位置不断弗断地变化,使观测者从弗同角度看到月球被太阳照明个部分,造成月相盈亏圆缺个变化。
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