Sundogs typically, but not exclusively, appear when the sun is low, e.g. at sunrise and sunset, and the atmosphere is filled with ice crystal forming cirrus clouds, but diamond dust and ice fog can also produce them. They are often bright white patches of light looking much like the sun or a comet, and occasionally are confused with those phenomena. Sometimes they exhibit a spectrum of colours, ranging from red closest to the sun to a pale bluish tail stretching away from the sun.^[1] White sundogs are caused by light reflected off of atmospheric ice crystals, while colored sundogs are caused by light refracted through them.

Egypt

There are records among the writings of the Ancient Egyptians that discuss two suns in the sky, and one that discusses the sun setting in the east, or moving backward.

A passage in Cicero's On the Republic (54-51 BC) is one of many by Greek and Roman authors who refer to sundogs and similar phenomen