Autumn has officially begun! In the Northern Hemisphere, the autumnal equinox falls on September 23 this year, marking the beginning of autumn and the Earth and Sun"s unique positions. Today is one of the two moments in the year when day and night are equal in length, thanks to the Sun"s location exactly above the Equator. The same celestial phenomenon applies to the Southern Hemisphere, but it is their vernal equinox as they head into spring.
Autumnal equinox
Today in History
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The beauty of intricate carvings
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Whats so funny?
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The animal kingdoms great migration
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Serene waters on a trembling earth
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Happy Cinco de Mayo!
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Brown-throated three-toed sloth
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Happy Boxing Day!
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Dad on duty
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Last night of the Proms
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The rolling hills of Moravia
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An endless stretch of sky
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West of Windermere
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We’re all smiles for World Hippo Day
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Sligachan Old Bridge, Isle of Skye, Scotland
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Alps of the sea
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Stunning symmetry
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Where did you drop the fish, son?
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A rocky wrinkle in time
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Tune into International Jazz Day
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Living in harmony
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Unbe-leaf-able
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Rethymno, Crete, Greece
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A prehistoric pavement
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Eyes on the skies
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The cliffs and canyons of Zion National Park
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Why is this cliffside ablaze?
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Beautiful Borovets
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World Population Day
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Mount Segla, Senja Island, Norway