Astronomers have detected what appear to be bands of clouds streaking across the surface of a cool star-like body known as a brown dwarf. The bands, resembling those that stripe the surface of Jupiter ...

Clouds of sand can condense, grow and disappear in some extraterrestrial atmospheres. A new look at old data shows that clouds made of hot silicate minerals are common in celestial objects known as ...

Thick brown clouds of soot, particles and chemicals stretching from the Persian Gulf to Asia threaten health and food supplies in the world, the U.N. reported yesterday, citing what it called the ...