I absolutely love atmospheric optics and learning about these awesome phenomenon. I caught a couple longer exposures around midnight (I believe?) on the camera, then processed them in an instant, and here they are lol. Coronas tend to form when light diffraction occurs around the sun/moon due to water droplets and all sorts of stuff. I remember coronas by knowing they consist of water droplets, and larger particles of something, like fog, or dust (but coronas like that form from low levels other than the atmosphere up above in the sky.) The bigger mass of the water particle or whatever causes the corona. Also, an aureole, which is made up of a beautifully colored fat-like set of rings which surround the sun or moon, is what makes the corona's great appearance. If you let the shutter run for a longer amount of time at night, watch out and make sure the moon isn't overexposing too much, otherwise you will get a very bright, washed out looking corona.
