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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The dry days of winter in Etosha
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An Alpine fairy-tale castle
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Cable car station, Graubünden, Switzerland
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A step toward freedom
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Grand Canyon National Park turns 105
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Christmas Eve
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Seitan Limania Beach, Crete
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Great on so many levels
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Remembering the Arizona
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Presidents Day
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World Whale Day
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Big sky at Big Bend
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A picture-perfect day on Trillium
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Marseille welcomes the Olympic torch
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A perfect day to fly your flag
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Did they forget to fly south?
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Halemaumau Crater, Hawaii Volcanoes National Park
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Endangered Species Day
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In the Red Sea for World Dolphin Day
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The wild heart of Tasmania
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Atlantic puffin, Iceland
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There’s treasure in them thar hills
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A wild and scenic scene
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Fannette Island, Lake Tahoe
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Winter solstice
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International Day of Human Space Flight
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Fall for birding
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A ‘Superior’ paddle
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Atolls in the Maldives
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Polar bears