Source: ESA Space Science
Venus cloud tops.
Image credits: ESA/MPS/DLR/IDA.
Clouds regularly punctuate Earth’s blue sky, but on Venus the clouds never part, for the planet is wrapped entirely in a 20 km-thick veil of carbon dioxide and sulphuric dioxide haze.
This view shows the cloud tops of Venus as seen in ultraviolet light by the Venus Express spacecraft on 8 December 2011, from a distance of about 30 000 km. (read more)