When astronaut Chris Hadfield was asked last week what his favorite photo taken during the first three weeks of a stint on the International Space Station was, he answered simply. “I love the ...

Bizarre, beautiful clouds—known as mother-of-pearl clouds because they resemble the inside of a pearl oyster shell—have been caught on camera high in the sky over Norway. These polar stratospheric ...

These are Mattis clouds, say hello to the Mattis clouds. They are cellular patches that hang at the base of clouds, commonly there, *** cumulonimbus clouds, but sometimes they can attach themselves to ...

Some of the stars appear to be missing in this intriguing new image. But the black gap in this glitteringly beautiful starfield is not really a gap, but rather a region of space clogged with gas and ...