Tonight was one of those Keyhole Astronomy sessions, where you observe through the gaps in between slowly moving banks of cloud.  While this wasn’t a problem, the 77% illuminated Moon was! I’m still struggling to complete the remaining items in Sagittarius (M69 and M70)  as these are all pretty much on the horizon when I’m able to observe them.  There was a little low murk above the horizon, but this seemed magnified by the…