Something completely different today, something I haven’t seen for a while due to the frequent lack of sun, something I’m sure many of you have seen in your skies. This is a solar halo, also known simply as halo or circular halo or 22° halo (because it has an apparent radius of approximately 22° around the sun, or the moon, in which case it would be a lunar halo, obviously). These haloes occur when light is refracted and reflected by ice crystals in the atmosphere. (Wikipedia has a more technical mathematical explanation, particularly of the 22° aspect of this phenomenon, if you’re so inclined.)