Twilight

Here's one of the things I'm interested in looking at pretty closely -- twilight.

Civil twilight is 0 - 0.5 hours (which is saturated on my camera)

Nautical twilight is 0.5 - 1 hour

Astronomical twilight is 1 - 1.5 hours

I can now confirm with these plots that yes indeed at 1.5 hours after / before sunset / sunrise, the sky is as dark as it's gonna get:

and here's the entire night, zoomed in to show the fuzz:

according to the MMT almanac, moonrise was 7.41 hours after sunset.  I see a brightening of the sky at about 7.0 hours after sunset.  ?????