A halo is the icy counterpart of a rainbow, with the main difference being that the light refracts in the ice crystals and not in droplets of water.
An incredibly complex halo in Russia.
A classical sun dog, or parhelion, is an effect of three ’suns’ appearing at once. This is also a halo, and the most common one at that, the sun appears to have two ’doubles’ at a distance of 22 degrees and at roughly the same height.
This is a light column in West Virginia. Such columns appear when sunlight reflects from the tiniest particles of ice in the air that look like hexagonal ice plates or rods.
Brocken spectre can sometimes be seen in the mountains through fog. This happens when you look to the side opposite the sun, and usually it is surrounded by a rainbow glow, also called a glory.
Such a glow appears when the solar wind collides with the Earth’s magnetic field, and it is actually not limited to the North and South Poles; there are known cases when northern lights have been seen in Greece.
Green flash appears with the first rays of dawn or the last light of dusk. It’s not only hard to catch, but also could be dangerous to the eyes. Aside from that, to see it, several conditions must be met: an open horizon, clear air and cloudless weather. For example, the photographer ’saw’ this green flash only when he plowed through the pictures he took that day.
This is a rare atmospheric event otherwise known as a ’circumhorizontal arc.’ It appears when horizontal sunbeams of the rising or setting sun reflects in the horizontal ice particles in clouds. The photo above was taken in the skies of Washington in 2006.
People in Zhangzhou, China, watch the solar eclipse on January 15, 2010.
These are multiple images of the solar eclipse on the ground under the tree leaves. This was made possible by the camera obscura effect the light seeps through small gaps between the leaves. This picture was taken in Madrid during the solar eclipse on October 3, 2005.