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Monday, September 22, 2014
9:00 AM - 5:00 PM

Autumnal equinox

At 10:29 p.m. today the Earth reaches the point in its orbit around the Sun where the days and nights are equal -- the start of autumn in the Northern Hemisphere.

Northern Hemisphere
Planet Earth
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More information: http://earthsky.org/astronomy-essentials/everything-you-need-to-know-september-equinox

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Autumnal equinox

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