Sun dog - a photo on Flickriver

Sun dog

            Sun dogs form when there are hexagonal ice crystals in high, cold cirrus clouds. They can also form when ice crystals float in the air during extremely cold weather. Although sun dogs are more common when cold weather brings ice crystals into the atmosphere, they can occur anywhere in the world any time there are cirrus clouds.

Ice crystals in the air act like prisms, bending the Sun's rays and refracting them in such a way that sun dogs appear. Because of the way that the Sun's light gets bent, sun dogs will often appear red on the side closest to the Sun with a blue or white tail stretching horizontally away from the Sun.

Scientists don't know how the term "sun dog" originated. Historians do know that the term has been around in art and literature for well over a century. Some experts believe the term may have arisen by way of comparing how parhelia follow the Sun to the way a dog follows its master.

The sun dog phenomenon can also occur at night when the Moon is nearly full and particularly bright. These moon dogs, or paraselenae, aren't seen nearly as often as sun dogs, because the conditions necessary for their formation don't happen very frequently.

Taken on: November 2, 2017

Tags:

B Tonner

Isle of Wight

Nikon D810

RAW

Tamron 28-300mm

frattonparker

fungi

Sundog

clouds

Cirrus

Cirrocumulus

Cumulus

Cumulonimbus

AltoCumulus

Alum Bay

Solent

ND2 filter « less

Sets appears in: • Clouding over

Groups appears in: • Utata • UK Landscapes, Sea and Country. more » • VentnorBlog • Isle of Wight - Photographers • Nikon -- D810 « less

Camera: Nikon D810, f/22.0, 0.6 sec, 300mm, ISO 31 (more info) (hide info)

Camera:	Nikon D810
Lens:	28.0-300.0 mm f/3.5-6.3
Aperture:	f/22.0
Exposure Time:	0.6
Focal Length:	300mm
ISO:	31
Exposure Bias:	-2/3 EV
Flash:	Off, Did not fire
Exposure Program:	Aperture-priority AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Sharpness:	Hard
Color Space:	Uncalibrated
Software:	Adobe Photoshop Lightroom 6.0 (Windows)
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