BE ALERT FOR MOON HALOS: The Moon is waxing full and the northern hemisphere is experiencing the deepening chill of autumn. That means it's time to be alert for Moon halos.
Moon halos are caused by ice in high clouds. Moonlight passing through six-sided crystals is bent into a luminous ring 22o in radius; the fuller the Moon, the brighter the halo.
The Moon will be nearly full on Oct. 28th and completely full on Oct. 29th, so those are good nights to look.