Fall is in the air—officially. The September equinox marks the transition from summer to autumn in the Northern Hemisphere, while in the Southern Hemisphere, spring is just beginning. The term "equinox," derived from Latin, means "equal night." It marks one of two points during the year when the sun sits directly over the equator, and the Earth receives roughly equal amounts of daylight and darkness.
Autumnal equinox
Today in History
More Desktop Wallpapers:
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Seven Magic Mountains art installation, Jean Dry Lake, Nevada
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The Easter Bunny’s story
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Burns Night
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Aït Benhaddou, Morocco
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World Book Day
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Museum Mile Festival
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Tokyo welcomes a futuristic new art museum
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Anniversary of the British Museum
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Moving as one
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Horse Head Rock, New South Wales, Australia
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Reflecting on fall
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Santo Antão Island in the Republic of Cabo Verde
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Birds and bees, and why they re so important
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Marine Corps War Memorial, Arlington, Virginia
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Are you older than this lake?
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Wind horses carry wishes for a new year
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In Apia Harbor for Samoan Independence Day
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Happy Mothers Day!
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Nazaré Lighthouse
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Autumn in Central Park, New York
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National Park Service Founders Day
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Antarctica Day
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On the lookout for Sheep-Cote Clod
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World Lion Day
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Where the bearded reedling sings
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A Portuguese fort takes a star turn
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Great horned owl fledglings
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Kochia, Hitachi, Ibaraki prefecture, Japan
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Happy Fourth of July!
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An underwater rainbow
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