The rise and sets of crescent and gibbous phase can be estimated in the same way . 蛾眉日和凸月的长落时刻，可以用同样的方法估计。
2.
As it circles our planet , the changing position of the moon with respect to the sun causes our natural satellite to cycle through a series of phases : new , new crescent , first quarter , waxing gibbous , full , waning gibbous , last quarter , old crescent and back to new again 当月球进入地球的半影时，应该是半影食，但由于它的亮度减弱得很少，不易察觉，故不称为月食，所以月食只有月全食和月偏食两种。
3.
Changed of moon phases are brough about by the non - self - luminosity and the opacity of the moon . as the moon is a spherical body , sunlight can only illuminate half of the moon . viewing from different directions , the moon will appear to take the shapes of a circle , a semi - circle , a crescent , a gibbous or even completely invisible at all when its dark side faces the earth 由于月球本身不发光，只是反射太阳光，所以当月球运转时，月球地球和太阳三者的相对位置便会不断变化，因此，地球上的观测者所见到月球被照亮的部分也在不断变化，从而产生不同的月相
