A sun dog, or parhelion (plural is parhelia) which means “beside the sun” in Greek, is also called a mock Sun or a phantom sun. This is an atmospheric phenomenon that results to the manifestation of bright spots of light in the horizon. It usually appears in the form of a halo or a luminously brilliant ring on either side of the sun.
Vädersolstavlan, The Sun Dog Painting of Stockholm depicts a two-hour sun dog episode from 1535. It is considered the oldest image of Stockholm in color. The artist is unknown and the original is lost. This is an image of a 17th century copy. Via 59 North. More here.
Enjoy the solstice and your sun dog.