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Sun Dogs mock suns or "parhelia"




Sun Dogs mock suns or "parhelia" - January - Haworth


Sun Dogs mock suns or

Sun dogs, also known as mock suns or "parhelia", are bright coloured spots that can be seen on one side (as in picture, on right of the sun) or both sides of the sun. They are positioned at 22 degrees to the sun.

The effect is caused be the refraction of light from six sided ice crystals in the atmosphere, as sunlight passes through the ice crystals it bends the light at 22 degrees.

In the Haworth Parish register on February 25th 1649 it says:

"Two suns appeared on either side of the true sun, making three in all".

It is possible that this was a sun dog being observed.




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