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Two sun dogs often flank the Sun within a 22° halo. The sun dog is a member of the family of halos caused by the refraction of sunlight by ice crystals in the atmosphere. Sun dogs typically appear as a pair of subtly colored patches of light, around 22° to the left and right of the Sun, and at the same altitude above the horizon as the Sun ...
A crisp parhelic circle (horizontal line) over South Pole Station. Photo: John Bortniak, NOAA, January 1979. A halo display observed over the South Pole. Featured in the photo are several distinct phenomena: A parhelic circle (horizontal line), a 22° halo (circle) with two sundogs (bright spots), and an upper tangent arc.
Many of these appear near the Sun or Moon, but others occur elsewhere or even in the opposite part of the sky. Among the best known halo types are the circular halo (properly called the 22° halo), light pillars, and sun dogs, but many others occur; some are fairly common while others are extremely rare.
Sun dogs shine behind caribou antlers on snowy Hudson Bay coast, Churchill, MB, Canada (Photo by: Dennis Fast / VWPics/Universal Images Group via Getty I 8 weather wonders to look for throughout ...
Halos, of Sun or Moon, including sun dogs; Haze; Heiligenschein or halo effect, partly caused by the opposition effect; Ice blink; Light pillar; Lightning; Mirages (including Fata Morgana) Monochrome Rainbow; Moon dog; Moonbow; Nacreous cloud/Polar stratospheric cloud; Rainbow; Sprite (lightning) Subsun; Sun dog; Tangent arc; Tyndall effect
The two phenomena can be distinguished by several features. Firstly, a circumhorizon arc always has a fixed location in the sky in relation to the Sun or Moon (namely below it at an angle of 46°), while iridescence can occur in different positions (often directly around the Sun or Moon).
The 4-year-old pup paced, and checked windows and doors. She even camped out in the closet to wait for her owners to return. Brown said this active dog is not cooped up at home often.
A circumzenithal arc in Salem, Massachusetts, Oct 27, 2012. Also visible are a supralateral arc, Parry arc (upper suncave), and upper tangent arc. From top to bottom: a circumzenithal arc on top of a 46° halo, on top of a Parry arc, on top of a tangent arc, on top of a 22° halo, on top of the actual sun.