At these heights, the atmosphere is cold enough that clouds are typically composed of ice crystals, not water droplets. These ...

At 300 light-years away, the interstellar cloud is the closest of its kind ever found to Earth and the largest apparent single structure in the sky.

An international team of scientists led by a Rutgers University–New Brunswick astrophysicist has discovered a potentially ...

Friday in D.C. occupied a special spot between May Day and Derby Day, and seemed to rise to the atmospheric occasion. It provided the benevolent warmth of near-summer, while showing off a sky full of ...