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
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Carlsbad Caverns National Park in New Mexico
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Celebrate Mandela Day
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Valentines Day
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Jamaica celebrates its independence
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Ardez, Graubunden, Switzerland
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‘Stepping’ into Black History Month
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Not your average sandcastle
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Chapada dos Veadeiros National Park shines
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Too awesome to be a planet
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A valley view at 9,000 feet
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Happy International Beaver Day!
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Jasper National Park, Alberta, Canada
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Horse Head Rock, New South Wales, Australia
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Happy birthday to the Peak!
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Spotted owlet, Bangkok, Thailand
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Have a ‘beary’ good Earth Day
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A tower of remembrance
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Surf s up—Down Under
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Moody skies over Valletta
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Great hornbill, Thailand
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The island fox’s incredible comeback
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Illuminations on the Gulf of Poets
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Smithsonian Secretary Lonnie Bunch on the institution s 175th anniversary
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Celestial Spain
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Grasmere, Lake District, Cumbria, England
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Let’s celebrate
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Happy Welsh New Year!
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Happy Holi!
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Mountain goats at Glacier National Park in Montana
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Fall Astronomy Week