What must our ancestors have thought when they saw meteors light up the night sky? Was it terrifying or an event of wonder? Thankfully, we now know that this celestial cascade is a harmless annual event. The Perseid meteor shower thrills stargazers from mid-July to late August and is due to peak today. The Perseids are caused by Earth passing through debris left behind by the Comet Swift-Tuttle. When the cosmic debris hits our atmosphere, it disintegrates in a colorful, fiery light display. It"s a good night to catch the Perseids if you can—the moon is projected to only be 10% illuminated, so the meteors should really stand out against the dark sky.
Perseid meteor shower over Oregon
Today in History
More Desktop Wallpapers:
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World Penguin Day
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Quiver trees in Namibia
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Winterpret on ice
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Blue-throated toucanet, Los Quetzales National Park, Costa Rica
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Arenal Volcano, Costa Rica
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Christmas Tree Point Road and Twin Peaks, San Francisco
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Channel Country, Australia
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Dressed to impress
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Detroit Industry Murals by Diego Rivera
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Kalalau Beach on the Nā Pali Coast, Kauai, Hawaii
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Tibetan New Year
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Arches National Park, Utah
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Three cheers for polar bears!
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A different view of sharks
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Happy Cinco de Mayo!
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Palazzo Zuccari, Rome
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Alaska National Interest Lands Conservation Act marks 42 years
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Shi Shi Beach, Olympic National Park, Washington
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The forecast calls for blooms
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Ancient til trees in Fanal Forest, Madeira, Portugal
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International Day of Light
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Marine Corps War Memorial, Arlington, Virginia
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Giant kelp in the Channel Islands National Marine Sanctuary
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A treaty for science
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Mont-Saint-Michel, Normandy, France
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Necropolis of Dargavs
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Bask in the glow—It s World Turtle Day
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Death Valley National Park, California
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International Day of the Tropics
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International Polar Bear Day
Bing Wallpaper Gallery

