[Glenn Dawes]

Hi guys,

I noticed recently in the threads some interest in Dark Hours, (the duration of astronomical darkness for any night). When we have been doing the yearbook we have always been open to improvements or additions. Admittedly this has been something we have discussed in the past but have put on the back burner thinking this may not be useful unless included for all capital cities. Perhaps a generic one might work, like our Rise/Set graphs.

Anyway, here's a draft example for Sydney (EST). I hope you like it. The reason why there are a number of days each month that are called New M (New Moon) is on these days the Moon is not in the sky between the end of evening twilight and beginning of dawn (so the dark hours is really the whole night). Likewise the Full M (Full Moon) are the days when the Moon is in the sky the whole time between the twilights (hence zero hours of dark time).

If anyone is interested it wouldn't take much to customize for your location (please make it the closest capital city for now).

Regards

Glenn