SkippySkyDark is written by Andrew Cool of Adelaide South Australia. Using the input lat, lon, year, month, day, Time Zone and Daylight Saving (if any), SkippySkyDark displays a plot showing curves for the elevation of the Sun and Moon, and a green box denoting that astronomically dark period of the night - if any!! .

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SkippySkyDark v1.08 December 29, 2012

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Here's the download link for the whole SkippySkyDark zip file (~19MB) SkippySkyDark.zip

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