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Civil twilight data

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Authored by The United States Naval Observatory (USNO)
Published on 13 Jan 2014

The United States Naval Observatory (USNO) provides a wide range of astronomical data and products, and serves as the official source of time for the U.S. Department of Defense and a standard of time for the entire United States.

The "Complete Sun and Moon Data for One Day" tool provides rise, set, and transit times for the Sun and Moon; civil twilight beginning and end times; and, lunar phase information for the U.S. and locations around the world.

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