October 24, 2012
These Mammatus clouds were photographed over Regina, Saskatchewan, Canada during the past summer. Mammatus (“mammary cloud” or “breast cloud”), is a meteorological term applied to a cellular pattern of pouches hanging underneath the base of a cloud. Image credit: wikimedia
April 8, 2012
The Moon and Venus converged, creating quite a sight by itself for sky enthusiasts around the globe. From some locations, though, the sky was even more picturesque. Photographer Isaac Gutiérrez Pascual
October 28, 2011
This is an impressive cumulonimbus anvil cloud looming over the Seven Sisters Mountain Range in the Black Hills of South Dakota. It was captured shortly after sunset – the view is looking toward the southeast. Photographer: David A Brown
August 27, 2011
One of the pretty sights of nature, Mammatus clouds, only occur where cumulonimbus clouds are present. It is usually linked to the after effect of tornadoes.