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Narrowband

The Moon


Concretedan

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Not daft at all. For a visual observer, there are good dark skies after sun down but before the moon rises. When the sun has dropped 18 degrees below the horizon, it’s properly dark. Before that, various shades of dusk, but in mid summer at 1am, I still find it to be usefully dark for DSOs with the sun at only around minus 14 degrees. Double stars and especially planets are worthwhile even in surprisingly blue skies! Similar effect with the moon, but much much much less pronounced. A very full moon will light the sky near the eastern horizon shortly before it rises, but the skies elsewhere are still usefully dark until it rises properly.

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