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. Around the Sun, it may also be called a sun halo. [1] Around the Moon, it is also known as a moon ring, storm ring, or winter halo.

A 22 degree halo is a ring of light 22 degrees from the sun (or moon) and is the most common type of halo observed and is formed by hexagonal ice crystals with diameters less than 20.5 micrometers.

Among the best-known halos is the 22° halo, often just called "halo", which appears as a large ring around the Sun or Moon with a radius of about 22° (roughly the width of an outstretched hand at arm's length).

The 22° Halo. The familiar 22° halo around the Sun or Moon occurs because of refraction in tiny hexagonal ice crystals in the air.

Feb 28, 2025 · Solar or 22-degree halos are defined as hazy rainbow-colored rings occurring at a radius of approximately 22 degrees around the sun. It results from the sun's light being refracted by ice crystals in Cirrus clouds in the upper troposphere at altitudes of …

The 22° halo (previously known as the small haloe) is the most frequently observed halo phenomenon. The small halo appears as a white or mostly white luminous ring of 22° radius with the light source (Sun or Moon) at its centre.

May 31, 2023 · Have you ever looked up and spotted a large ring of light around the sun or moon? Scientists refer to these as 22-degree halos. They got that name because the radius of the circle is always...

Dec 16, 2024 · The article explores the characteristics, visibility, and misconceptions surrounding the mesmerizing 22-degree halo, a stunning circular halo created by ice crystals in cirrostratus clouds. It also provides safety precautions for observing the halo and emphasizes the importance of eye protection.

The 22-degree halo is the most frequent of the many halo phenomena that can appear as sunlight is refracted through the ice crystals of thin layers of high clouds, such as Cirrus, Cirrostratus and Cirrocumulus, or the ground-level ice-crystal cloud, diamond dust.

A halo in the form of a circle, or portion of a circle, with an angular radius of about 22° about a light source, such as the sun or moon. This is the most common of all halos. The sky is darker just to the inside of the halo than it is to the outside.