Here is a twitter thread I am very certain you will enjoy:
You must certainly click through and read the whole thing. Although some of the photos are more dramatic than this one I’ve linked here, I have to say, this somewhat more subtle phenomenon strikes me as especially beautiful.
What would this be in an SFF world? Aliens, obviously; that’s one possibility. But in fantasy? I’m considering creating a fantasy phenomenon that would look like this because it’s just so amazingly cool to look at.