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 bac
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 bac
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。