Download a copy of Justin McCollum's February 2009 presentation: "Celestial Coordinate Systems" (Download PDF File)
Current Conditions
Columbus Current Weather
Today, April 18, 2024
Dawn: 05:30 A.M.
Sunrise: 06:52 A.M.
Sunset: 07:51 P.M.
End Twilight: 09:14 P.M.
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Columbus
Learn how to read it the clear sky chart.