Tacita Dean has installed her exquisite new suite of 15 hand-drawn, three-color lithographs of wispy white clouds floating in bright blue skies high on the wall in the front room at the print ...

After multiple failed attempts, NASA’s Terrier-Improved Malemute sounding rocket lit up the sky with blue-green and red artificial clouds. CNN values your feedback 1.

The star HD 34989 is emitting light, and that light is very blue. In fact, it gives off a lot of ultraviolet light. The gas cloud has a lot of hydrogen in it, which loves to absorb that UV light.

Night sky photographer Ruslan Merzlyakov captured bright blue-white noctilucent clouds dancing over Nykøbing Mors in Denmark just before dawn on July 1.

The new photo was taken by the Very Large Telescope in Chile and shows two clouds of gas shining in blue and red in the Large Magellanic Cloud, about 163,000 light-years from the Milky Way.