December 2010 lunar eclipse

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What Wikipedia says

A total lunar eclipse occurred at the Moon’s descending node of orbit on Tuesday, 21 December 2010, with an umbral magnitude of 1.2576. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened.

Excerpt from the Wikipedia article “December 2010 lunar eclipse”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Andrew tk tang, CC BY-SA 3.0, via Wikimedia Commons.