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Volume 16 -- Issue 12
What's Up? -- December 2010

December Solstice Total Lunar Eclipse

   Depending on your time zone most folks living in the United States will be able to see some or all of the total lunar eclipse. From my location near Kansas City Missouri, in the central time zone, the eclipse begins on the 20th, Monday evening at approximately 11:30 p.m. when the Moon enters the faint outer shadow called the penumbra. The full Moon is near the feet of the Gemini Twins and very high above the southern horizon. At 12:30 a.m. the Moon starts moving into the darker inner shadow called the umbra. About an hour later, at around 1:45 a.m. CST, the Moon is completely within the dark umbra shadow and totality has begun.
   During totality it may be possible to see an open star cluster, M-35 located about 3 degrees the left from the eclipsed Moon.
   Totality comes to an end at around 3:00 a.m. CST as the Moon starts moving out of the umbral shadow. By 4:00 a.m. the Moon has completely left the dark umbral shadow and will spend the next hour moving out of the fainter penumbral shadow.
   Use the link on the Calendar page to see more detailed time information and a map of the world showing the complete viewing area.