![](https://derekscope.co.uk/wp-content/uploads/2024/05/Glow-sun-dog.jpg)
Sundogs are coloured spots of light that develop due to the refraction of light through ice crystals.
![](https://derekscope.co.uk/wp-content/uploads/2024/05/Sun-dog-1.jpg)
They are located approximately 22° halo either left, right, or both, from the sun, depending on where the ice crystals are present.
![](https://derekscope.co.uk/wp-content/uploads/2024/05/diagram.jpg)
A 22° halo is an atmospheric optical phenomenon that consists of a halo with an apparent radius of approximately 22° around the Sun.
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