posted December 19, 2010 02:41 PM            

The lunar eclipse early Tuesday morning will be the first total lunar eclipse to occur on the Winter solstice since 1638. The Winter solstice is the shortest day of the year in the Northern Hemisphere.

The upcoming Dec. 21 full moon — besides distinguishing itself from the others in 2010 by undergoing a total lunar eclipse — will also take place on the same date as the solstice (the winter solstice if you live north of the equator, and the summer solstice if you live to the south).

Winter solstice is the shortest day of the year in the Northern Hemisphere and marks the official beginning of winter. The sun is at its lowest in our sky because the North Pole of our tilted planet is pointing away from it.
http://www.csmonitor.com/Science/2010/1219/Lunar-Eclipse-First-to-coincide-with-Winter-Solstice-in-372-years

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