If our eyes could see radio waves, the nearby galaxy Centaurus A (Cen A) would be one of the biggest and brightest objects in the sky, nearly 20 times the apparent size of a full moon. What we can't see when looking at the ...
Astronomy
Apr 1, 2010
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One of the pleasures of perusing ancient maps is locating regions so poorly explored that mapmakers warned of dragons and sea monsters. Now, astronomers using NASA's Fermi Gamma-ray Space Telescope find themselves in the ...
Astronomy
Mar 2, 2010
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(PhysOrg.com) -- 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 ...
General Physics
Feb 17, 2010
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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 ...
Astronomy
Oct 28, 2009
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(PhysOrg.com) -- Scientists at the Naval Research Laboratory Space Science Division and a team of international researchers have positively identified cosmic sources of gamma-ray emissions through the discovery of 16 pulsating ...
Astronomy
Sep 22, 2009
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(PhysOrg.com) -- Ever since the Large Area Telescope launched aboard the Fermi Gamma-ray Space Telescope in June 2008, the LAT team has been analyzing data, searching for answers to some of the most pressing questions in ...
Astronomy
Aug 27, 2009
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Back in June 1991, just before the launch of NASA's Compton Gamma-Ray Observatory, astronomers knew of gamma rays from exactly one galaxy beyond our own. To their surprise and delight, the satellite captured similar emissions ...
Astronomy
Jul 14, 2009
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On Dec. 11, 2021, NASA's Neil Gehrels Swift Observatory and Fermi Gamma-ray Space Telescope detected a blast of high-energy light from the outskirts of a galaxy around 1 billion light-years away. The event has rattled scientists' ...
Astronomy
Dec 7, 2022
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A highly unusual blast of high-energy light from a nearby galaxy has been linked by scientists to a neutron star merger.
Astronomy
Dec 7, 2022
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Through giant lobes of gamma radiation, an international team of researchers have found a small satellite galaxy of the Milky Way filled with dark matter, but whose emissions are more likely the result of millisecond pulsars ...
Astronomy
Sep 11, 2022
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