You can see strange things in the far north... like three suns! This photo was taken by Felipe Menzella in northern Sweden. The central bright spot is the sun, while the other two are 'parhelia' - also called 'sun dogs'.
A parhelion is a halo caused by the refraction of sunlight by ice crystals in the atmosphere. They show up around 22° to the left and right of the sun.
If you're a physicist, you'll instantly wonder: why to the left and right, but not top or bottom? In fact you can see light all around the Sun at a 22° angle, but it's much brighter to the left and right. Why?
The air here is full of ice crystals of a special kind: flat, thin hexagonal prisms of ice. As these crystals gently float down, they bend the light rays passing through them. And since they mainly lie flat, with their large hexagonal faces almost horizontal, the sunlight is refracted horizontally. Thus, the parhelia are seen mainly to the left and right of the sun!
But some of these ice crystals wobble as they fall, so we get a bit of light all around the sun.
This was NASA's astronomy picture of the day:
https://apod.nasa.gov/apod/ap250215.html
and for more pictures of parhelia, read this:
https://en.wikipedia.org/wiki/Sun_dog
Parhelia are just one of many related strange phenomena. You can see a bunch of them in my next post.
(1/2)