The term "sun dog" (or mock sun) originates from Greek mythology. It was believed the god Zeus walked his dogs across the sky and that the bright "false suns" in the sky on either side of the sun's disk were the dogs.

What is the proper name for a sundog?

The scientific name is parhelion (plural: parhelia) from the Greek parēlion, meaning "beside the sun." Speculation is that they are called that because they follow the sun like a dog follows its master. Sundogs (or sun dogs) are also referred to as mock suns or phantom suns.

Are sun dogs real?

Sundogs are colored spots of light that develop due to the refraction of light through ice crystals. They are located approximately 22 degrees either left, right, or both, from the sun, depending on where the ice crystals are present.

What is another name for sun dogs?

A sun dog (or sundog) or mock sun, also called a parhelion (plural parhelia) in meteorology, is an atmospheric optical phenomenon that consists of a bright spot to one or both sides of the Sun.

How do sun dogs occur?

Sun dogs are formed by hexagonal ice crystals suspended in clouds that drift in the air at lower levels. These ice crystals act as a prism, bending the light rays that pass through them. As the crystals sink vertically through the air, they refract the sun rays horizontally, leading to the formation of sun dogs.

What is a sun dog?

How rare is a sun dog?

While you probably won't see a sundog every day, the phenomenon is not exactly rare. According to Rogers, it's just a matter of the sun being in the correct orientation with relation to ice crystals in the air. Rogers says sundogs are to be expected every winter, especially in more northern latitudes, like the Dakotas.

What do sun dogs symbolize?

A Sign of Foul Weather

Despite their beauty, sundogs are indicative of foul weather, just like their halo cousins. Since the clouds that cause them (cirrus and cirrostratus) can signify an approaching weather system, sundogs themselves often indicate that rain will fall within the next 24 hours.

What does a Sundog mean in the summer?

Sundogs are caused by a layer of ice crystals between your eyes and the sun. The crystals cause a refraction of the light somewhat similar to the process that forms a rainbow, except that the refraction is different with ice crystals than with raindrops.

What does a Sundog mean in the winter?

Sundogs and Weather Prediction

Probably the biggest difference between the two is that a rainbow usually signals an end to the rain, while a sundog often means that rain, or snow is on the way. Next time you see a sundog, look out for wet weather!

How rare is a sun halo?

Halos around the Sun and Moon are certainly not rare. They are caused by high cirrus clouds refracting light. Cirrus clouds are so high in the sky (typically higher than 20,000 feet), they are made up of millions upon millions of tiny ice crystals which readily refract the light from the Sun or Moon.

What are the differences of a halo and a Sundog?

The difference between sundogs and halos is the preferential orientation of the ice crystals through which the light passes before reaching our eyes. If the hexagonal crystals are oriented with their flat faces horizontal, a sundog is observed. If the hexagonal crystals are randomly oriented, a halo is observed.

Why is the inner edge of a Sundog red?

Due to the dispersion of light upon passing through the ice crystal, sundogs can be seen with red colored inner edge since red is the least refracted color.

What does a double rainbow around the sun mean?

Halos are caused by cirrus clouds

Those thin cirrus clouds are around 20,000 feet or higher above us. They are made of tiny, ice crystals. Sunlight through the ice crystals causes the light to split, or be refracted. When at just the right angle, it causes us to see the halo.

What are sundogs and moondogs?

Often, however, they may seem to appear without the halo. By day, with the Sun, one of these phenomena is called a parhelion, or sun dog. By night, it is called a paraselene, or Moon dog. Look for a Moon dog when you see high, thin, cirrus clouds near the Moon.

What does a rainbow around the sun symbolize?

Bottom line: Halos around the sun or moon are caused by high, thin cirrus clouds drifting high above your head. Tiny ice crystals in Earth's atmosphere create the halos. They do it by refracting and reflecting the light. Lunar halos are signs that storms are nearby.

Is seeing a sundog good luck?

In medieval times, the three bright lights were sometimes interpreted as the sign of the trinity, a sign of great fortune. Nowadays, seeing a rainbow or a sundog is a sign of good luck (or, perhaps just being at the right place at the right time?).

Are sundogs good luck?

Some say it's shaped like a dog leaping through a ring of flames. It's known as a Sundog. In native folklore, it's said that if you spot a Sundog while on a journey, you'll experience good luck and many rewards.

Why is it called a Moon Dog?

A moon dog (or moondog) or mock moon, also called a paraselene (plural paraselenae) in meteorology, is an atmospheric optical phenomenon that consists of a bright spot to one or both sides of the Moon. They are exactly analogous to sun dogs.

What is the main reason there are halos sundogs and rainbows?

Sundogs, light pillars, and other kinds of halos seen in the sky are atmospheric phenomena that occur when light is reflected or refracted by ice crystals in the atmosphere.

Is there such a thing as a Snowbow?

The fact is that there are snowbows, the ice-crystal analog to rainbows. A snowbow is a fairly rare phenomenon that forms when sunlight is reflected and refracted by ice crystals in the air (just as a normal rainbow is produced by the reflection and refraction of sunlight by raindrops).

Can there be an upside down rainbow?

They're called circumzenithal arcs, and they're not really rainbows. Instead, they're caused by ice crystals in the upper atmosphere. These arcs are related to the frequently seen halos around the sun or moon.

How is a Parhelion formed?

Parhelia are the result of sunlight passing through hexagonal ice crystals contained within cirrus cloud. They often appear in conjunction with 22° Haloes which are produced under the same conditions.

What is a snow dog in the sky?

"The colder the better." Snow dogs are part of an ice halo, which typically include the familiar circle around the sun (or moon) and are most easily seen when the sun is low in the sky, he said. The reflecting light, displaced 22 degrees to the left and right of the sun, are also called snow bows.

Why is halo called 22?

A 22° halo is an atmospheric optical phenomenon that consists of a halo with an apparent radius of approximately 22° around the Sun or Moon. When visible around the Moon, it is also known as a moon ring or winter halo.