Photo Agency - Astronomy - Space - Nature

> Sun Halo

Sun Halo

author: L.Laveder/Novapix

reference: t-met03-00011

Image Size 300 DPI: 29 * 19 cm

Halos are caused by sunlight being refracted by cirro-stratus clouds. These are thin clouds, very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo around the sun that is 44 degrees in diameter.
In brief:
- around the Sun, the 22° halo, not very contrasted.
- on the left of the Sun, a bright parhelia uncolored.
- atop the 22° halo, the upper tangent arc.
- on the left, the Parry arc.
- near the zenith, the circumzenithal arc.
October 28, 2006.

Keywords for this photo:

2006 - ATMOSPHERIC PHENOMENA - CIRROSTRATUS - CLOUD - EARTH - HALO - METEOROLOGY - PARHELION - SUN -