Total Lunar Eclipse | featured news

This month's full moon will pass almost directly through the center of Earth's shadow on Wednesday in what will be an unusually long total eclipse of the moon, 100 minutes. The next total lunar eclipse of exceptional length will be July 27, 2018, and will last 106 minutes.

Skywatchers got an early holiday present this year: A total eclipse of the moon. Hanging high in the sky, the moon slowly turned from bright silver into a red disk early Tuesday. A total lunar eclipse occurs when the Earth casts its shadow on the full moon, blocking the sun's rays that otherwise reflect off the moon's surface. Some indirect sunlight still pierces through to give the moon its eerie hue.

For a few hours on the night of Dec. 20 to Dec. 21, the attention of tens of millions of people will be drawn skyward.