The explosions of stars, known as supernovae, can be so bright they outshine their host galaxies. They take months or years to fade away, and sometimes, the gaseous remains of the explosion slam into hydrogen-rich gas and ...
Astronomy
Sep 12, 2018
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(PhysOrg.com) -- A gamma-ray burst detected by NASA's Swift satellite in April 2009 has been newly unveiled as a candidate for the most distant object in the universe. At an estimated distance of 13.14 billion light years, ...
Astronomy
May 25, 2011
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(PhysOrg.com) -- Gamma-ray bursts are among the most energetic events in the Universe, but some appear curiously faint in visible light. The biggest study to date of these so-called dark gamma-ray bursts, using the GROND ...
Astronomy
Dec 16, 2010
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Gamma-ray bursts (GRBs) have been detected by satellites orbiting Earth as luminous flashes of the most energetic gamma-ray radiation lasting milliseconds to hundreds of seconds. These catastrophic blasts occur in distant ...
Astronomy
Nov 11, 2022
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(Phys.org) -- So far, astrophysicists thought that super-massive black holes can only influence their immediate surroundings. A collaboration of scientists at the Heidelberg Institute for Theoretical Studies (HITS) and in ...
Astronomy
May 15, 2012
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(Phys.org)—Astronomers using data from NASA's Fermi Gamma-ray Space Telescope have made the most accurate measurement of starlight in the universe and used it to establish the total amount of light from all of the stars ...
Astronomy
Nov 1, 2012
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(Phys.org) —The field of view from Earth is being flooded with the brightest display of gamma rays ever seen, the BBC is reporting, at a time when space researchers around the world have just coincidently trained their ...
Bursts of gamma rays from the center of our galaxy are not likely to be signals of dark matter but rather other astrophysical phenomena such as fast-rotating stars called millisecond pulsars, according to two new studies, ...
Astronomy
Feb 3, 2016
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(Phys.org) -- On 26 July 2012, the H.E.S.S. II telescope started operation in Namibia. Dedicated to observing the most violent and extreme phenomena of the Universe in very high energy gamma-rays, H.E.S.S. II is the largest ...
Astronomy
Jul 26, 2012
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(Phys.org) —In late June 2013, an exceptional binary containing a rapidly spinning neutron star underwent a dramatic change in behavior never before observed. The pulsar's radio beacon vanished, while at the same time the ...
Astronomy
Jul 22, 2014
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