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Ecipses happen when the Sun, Moon, and Earth line up just right. The 2:34 video totorial below, from NASA's Goddard Space Flight Center (download available), explains what happens during a total solar eclipse and a partial eclipse and how often they occur. The video also explains how a solar eclipse differs from a lunar exlipse and, gives a helpful tip on how to remember the difference,
NASA's Goddard Space Flight Cener July 21st announcement of the video tutorial with related videos.
A Science Friday post by the NASA-sponsored International Observe the Moon team. Includes: Supermoon lunar eclipse video; Moon observation log; Video of 2015 lunar phases; Features map of the Moon; and Create a Moon impact painting. #moon