https://www.sott.net/articles/show/241465-Two-Suns-in-Crimea
The comment says:
There is a free software called HaloSim which calculates/renders sun halos depending on the geometric shape of the ice crystals in the atmosphere. The site and the research of Les Cowley is well worth checking out:
http://www.atoptics.co.uk/halo/dogalt.htm
In this case, it indeed seem to be "sundogs". Halos of the sun can have various and complex shapes, depending on the shape of the crystales. Here is a computer rendering of a full halo:
Here is the real world equivalent:
According to Les Cowley:
Here is a microscope picture of a few possible ice crystal shapes:
The site is full of pictures and examples (including theoretical halos formed by CO2 or Methane crystals on other planets). I can highly suggest taking the time and clicking through all of the menu items. It's an amazing subject.
Edit: In the pictures of the original news item, note that there is also another "sun" appearing on the street. This seems to be an internal reflection inside of the camera lens, since it's diametrically opposite (measured from the image center) to the real sun.
The comment says:
Some of you may think that it's a kind of 'sundog' which forms when sunlight refracts through ice crystals and produces striking halo effects, but since it is not an isolated or exclusively winter phenomenon, we propose that "two suns" and other similar anomalous phenomena are a 'mirage' effect of some sort whereby the sun is being refracted by the changed atmosphere. That is, a combination of possible comet dust loading and changes in the layers of the atmosphere.
There is a free software called HaloSim which calculates/renders sun halos depending on the geometric shape of the ice crystals in the atmosphere. The site and the research of Les Cowley is well worth checking out:
http://www.atoptics.co.uk/halo/dogalt.htm
In this case, it indeed seem to be "sundogs". Halos of the sun can have various and complex shapes, depending on the shape of the crystales. Here is a computer rendering of a full halo:
Here is the real world equivalent:
Besides, when was the last time you heard about "two suns" being reported or observed? This is very strong evidence for major changes in the atmosphere and the question you've got to be asking yourself is, why?
According to Les Cowley:
Halos appear in our skies far more often than do rainbows. They can be seen on average twice a week in Europe and parts of the United States. The 22° radius circular halo and sundogs (parhelia) are the most frequent.
Here is a microscope picture of a few possible ice crystal shapes:
The site is full of pictures and examples (including theoretical halos formed by CO2 or Methane crystals on other planets). I can highly suggest taking the time and clicking through all of the menu items. It's an amazing subject.
Edit: In the pictures of the original news item, note that there is also another "sun" appearing on the street. This seems to be an internal reflection inside of the camera lens, since it's diametrically opposite (measured from the image center) to the real sun.