Latest Terrestrial gamma-ray flash Stories
Satellites are big and cost a lot of money -- at least that's the impression a couple of University of Maryland-College Park students had when they applied for an internship to help construct a satellite instrument with scientists at the NASA Goddard Space Flight Center in Greenbelt, Md.
There are many cultural myths concerning black holes -- several of the myths are perpetuated by television and movies.
A team of Spanish researchers has made a high-speed recording of elves and sprites in storms, fleeting and luminous electric phenomena produced in the upper layers of the atmosphere.
Instruments scanning outer space for cataclysmic explosions called gamma-ray bursts are detecting intense flashes of gamma-ray energy right here in the friendly skies of Earth.
High-energy bursts of gamma rays typically occur far out in space, perhaps near black holes or other high-energy cosmic phenomena - so imagine scientists' surprise in the mid-1990s when they found these powerful gamma ray flashes happening right here on Earth, in the skies overhead.
New information about lightning-emitted X-rays, gamma rays and high-energy electrons during thunderstorms is prompting scientists to raise concerns about the potential for airline passengers and crews to be exposed to harmful levels of radiation.
A new nano satellite mission, called 'Firefly,' sponsored by the National Science Foundation (NSF) and led by NASA's Goddard Space Flight Center in Greenbelt, Md will explore the relationship between lightning and these sudden bursts, called Terrestrial Gamma Ray Flashes (TGFs).
Giant red blobs, picket fences, upward branching carrots, and tentacled octopi -- these are just a few of the phrases used to describe sprites -- spectacular, eerie flashes of colored light high above the tops of powerful thunderstorms that can travel up to 50 miles high in the atmosphere.
A great mystery was set in motion a few years ago when a spacecraft designed to measure gamma-ray bursts -- the most powerful explosions in the Universe -- found that Earth was actually emitting some flashes of its own.
- The act of lurking; skulking about; hiding; keeping from sight.
More Images (3 images) »