If the moon becomes completely immersed into the umbra , a total eclipse occurs ; and if only a portion of it falls into the umbra , a partial eclipse occurs 当月球整个都进入本影时，就会发生月全食但如果只是一部份进入本影时，则只会发生月偏食。月全食和月偏食都是本影月食。
If the moon becomes completely immersed into the umbra , a total eclipse occurs ; and if only a portion of it falls into the umbra , a partial eclipse occurs 当月球整个都进入本影时，就会发生月全食；但如果只是一部份进入本影时，则只会发生月偏食。月全食和月偏食都是本影月食。
This partial eclipse is rather shallow with an umbral magnitude of only 0 . 068 , meaning that 6 . 8 percent of the moon s diameter will enter into the umbra total shadow of the earth at the middle of eclipse 这次月偏食的食分较小，只有零点零六八，即是在食甚时，月球有百分之六点八的直径进入地球本影。
This partial eclipse is rather shallow with an umbral magnitude of only 0 . 068 , meaning that 6 . 8 percent of the moon s diameter will enter into the umbra ( total shadow ) of the earth at the middle of eclipse 这次月偏食的食分较小，只有零点零六八，即是在食甚时，月球有百分之六点八的直径进入地球本影。
Solar eclipses occur when the sun is obscured by the moon , an occasion when the sun , the moon and the earth are in near alignment , and the earth moves into the moon s umbra or penumbra 日食是太阳被月球所掩盖的自然现象。当太阳月球及地球接近排成一条直线时，地球便会进入月球的本影或半影，日食便会发生。
Umbra lets you emphasize the intensity of shadows in the area fully protected by the direct rays shot by the lighting source : the light transition between fully shadowed areas and fully lit areas change more quickly 日蚀允许你增强被光源发射直接光线包围的区域中的阴影深度：在完全阴影区域和完全照亮区域之间，光线急剧转换。
During totality , the moon is not completely invisible . this is due to the fact that some sunlight are refracted by the earth s thin atmosphere into the umbra and illuminate the moon , making it coppery - red in colour 在月全食时，月球并不是完全看不见的，这是由于太阳光在通过地球的稀薄大气层时受到折射进入本影，投射到月面上，令到月面呈红铜色。
During totality , the moon is not completely invisible . this is due to the fact that some sunlight are refracted by the earth s thin atmosphere into the umbra and illuminate the moon , making it coppery - red in colour 在月全食时，月球并不是完全看不见的，这是由于太阳光在通过地球的稀薄大气层时受到折射进入本影，投射到月面上，令到月面呈红铜色。
When the moon totally enters the umbra the full shadow of the earth , it is a total lunar eclipse ; when only part of the moon passes into the umbra , it is a partial lunar eclipse ; as to the penumbral lunar eclipse , it describe a phenomenon when the moon only enters the penumbra the partial or incomplete shadow of the earth 当月球只有部份进入地球的本影时，便会出现月偏食而当整个月球进入地球的本影内时，便会出现月全食至于半影月食，是指月球只是掠过地球的半影区，造成月面的光度极轻微减弱，很难用肉眼发觉有甚么分别，因此不为人所注意。
