U.S. officials are tracking a high-altitude balloon floating over the Rocky Mountains, officials said Friday afternoon, just over a year after U.S. Air Force fighter jets shot down a suspected ...

NASA's GUSTO mission, which launched from Antarctica on Dec. 31, set a new agency record for a heavy-lift, long-duration scientific balloon flight.

Around this time, the sun never dips far below the horizon, leaving it well placed to illuminate the high-altitude icy particles as night settles in. Noctilucent clouds most commonly appear ...

High-altitude balloon spotted floating above Northern Colorado 00:24. It was an unusual sight in the sky over Northern Colorado on Friday morning- a balloon floating above Longmont.