If you"re lucky enough to find yourself under a cloudless sky tonight, you"ll be able to see one of our solar system"s great wonders, a full lunar eclipse, also known as a "blood moon." The spooky nickname derives from the reddish hue the moon takes on when Earth casts its shadow upon it. Featured here is a blood moon over the Swiss Alps. A full lunar eclipse occurs when the Earth and moon align perfectly with the sun, and the moon falls directly behind Earth"s shadow. When Earth falls behind the moon"s shadow, a solar eclipse occurs.
Lunar eclipse
Today in History
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Lunar eclipse
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What, no escalator?
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Castle Square, Old Town, Warsaw, Poland
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A red fox on the Swiss side of the Jura Mountain range
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Celebrating National Panda Day
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Fog above the forest
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Laguna de Torrevieja, Spain
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I am the walrus
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World Oceans Day
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Black History Month
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Rocky mountain pi
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Rooftops in the walled city of Urbino, Italy
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Rice processing in Bangladesh
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Sailing on thick ice
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One giant leap for penguins
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A lunar lantern celebration
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Icelandic horses, Iceland
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Native American Heritage Day
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A personal collection becomes an institution
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Tokyo welcomes a futuristic new art museum
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National Park Week begins
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Up in the Highlands
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Don’t look down
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National Park Week continues
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What’s blooming in New Zealand?
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Atlantic puffin, Iceland
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A little bit of Wonderland in New York City
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Breaking the fast for Eid
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Hawaii Volcanoes National Park turns 103
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Welcome to California