Major improvements to methods used to process observations from NASA's Fermi Gamma-ray Space Telescope have yielded an expanded, higher-quality set of data that allows astronomers to produce the most detailed census of the ...
Astronomy
Jan 7, 2016
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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. These terrestrial gamma-ray flashes, or TGFs, ...
Earth Sciences
Feb 11, 2010
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Supernovae, neutron star collisions and active galactic nuclei are among the most energetic phenomena in the known universe. These violent explosions produce high-energy gamma rays and cosmic rays, which can easily travel ...
Astronomy
Mar 20, 2015
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A multinational team of astronomers involving the University of Adelaide has catalogued over 70 sources of very high energy gamma rays, including 16 previously undiscovered ones, in a survey of the Milky Way using gamma ray ...
Astronomy
Apr 20, 2018
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(PhysOrg.com) -- The combined data from several NASA satellites has astonished astronomers by revealing unexpected changes in X-ray emission from the Crab Nebula, once thought to be the steadiest high-energy source in the ...
Astronomy
Jan 13, 2011
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An international team of astronomers has studied variable broadband emission of the gamma-ray blazar Markarian 501 during a period of its high X-ray activity. The research, published January 21 on the arXiv preprint server, ...
A team of scientists hope to trace the origins of gamma-ray bursts with the aid of giant space 'microphones'.
Astronomy
Nov 20, 2014
79
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(Phys.org) —Blazars are the brightest of active galactic nuclei, and many emit very high-energy gamma rays. New observations of the blazar known as PKS 1424+240 show that it is the most distant known source of very high-energy ...
Astronomy
Apr 18, 2013
1
0
Scientists now know that thunderstorms, working as powerful natural terrestrial particle accelerators, produce intense flashes of ionizing radiation called "dark lightning." To further their understanding of this phenomena, ...
Earth Sciences
Jun 13, 2013
2
0
Life and supernovae don't mix.
Astronomy
Oct 27, 2022
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