Starship Asterisk*

This has been an enjoyable discussion. We are going sub-zero in Minnesota for the next several days. Since these are the conditions that often result in light pillars I will be looking for them, with sharpened observational skills, over the next several nights.

I thought I posted on this this morning, but since my posting has not shown up, I may have sent it elsewhere. Here is my second attempt. I agree with PManson (and others now) that light pillars result from diffuse light being selectively reflected by planar ice crystals falling in calm air and there...