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All Articles Tagged As: blazars
 | Jets of particles streaming from black holes in far-away galaxies operate differently than previously thought, according to a study published today in Nature. The new study reveals that most of the jet's light -- gamma rays, the universe's most energetic form of light -- is created much farther from the black hole than expected and suggests a more complex shape for the jet. ...> Full Article |
 | A galaxy located billions of light-years away is commanding the attention of NASA's Fermi Gamma-ray Space Telescope and astronomers around the globe. Thanks to a series of flares that began Sept. 15, the galaxy is now the brightest source in the gamma-ray sky -- more than 10 times brighter than it was in the summer. ...> Full Article |
 | During its first year of operations, NASA's Fermi Gamma
Ray Space Telescope mapped the extreme sky with unprecedented
resolution and sensitivity. It captured more than one thousand
discrete sources of gamma rays -- the highest-energy form of light.
Capping these achievements was a measurement that provided rare
experimental evidence about the very structure of space and time,
unified as space-time in Einstein's theories. ...> Full Article |
 | The gamma-ray sky comes alive in a movie made from data acquired by NASA's Fermi Gamma-ray Space Telescope during its first three months of operations. Gamma rays from sources near and far turn the sky into a hypnotic froth. The sun arcs serenely across the northern sky as active galaxies called blazars flare up and fade out. ...> Full Article |
 | An international team of astrophysicists using telescopes on the ground and in space have uncovered surprising changes in radiation emitted by an active galaxy. The picture that emerges from these first-ever simultaneous observations with optical, X-ray and new-generation gamma-ray telescopes is much more complex than scientists expected and challenges current theories of how the radiation is generated. ...> Full Article |
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