The luster will be a bit “off” on Dec. 21st, the first day of northern winter, when the full Moon passes almost dead-center through Earth’s shadow. For 72 minutes of eerie totality, an amber light will play across the snows of North America, throwing landscapes into an unusual state of ruddy shadow.
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Related reading:
Lunar Eclipse Tonight + Winter Solstice—First in 372 Years
National Geographic (20 Dec 10)
Total Lunar Eclipse of December 21
NASA_Eclipses Durning 2010
Winter Solstice
Wikipedia