Astronomers reveal the largest cosmic explosion ever seen
A team of astronomers led by the University of Southampton has uncovered the largest cosmic explosion ever witnessed.
Astronomy
May 11, 2023
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Page 2 - News tagged with cosmic gamma rays
Cosmic radiation causes fluctuations in global temperatures, but doesn't cause climate change
(Phys.org)—Unlike electromagnetic radiation, which consists of massless and accelerated charged particles, galactic cosmic rays (CR) are composed mostly of atomic nuclei and solitary electrons, objects that have mass. Cosmic ...
Fast radio burst tied to distant dwarf galaxy, and perhaps magnetar
One of the rare and brief bursts of cosmic radio waves that have puzzled astronomers since they were first detected nearly 10 years ago has finally been tied to a source: an older dwarf galaxy more than 3 billion light years ...
Astronomy
Jan 4, 2017
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IceCube Neutrino Observatory reports first evidence for extraterrestrial high-energy neutrinos
(Phys.org) —A massive telescope in the Antarctic ice reports the detection of 28 extremely high-energy neutrinos that might have their origin in cosmic sources. Two of these reached energies greater than 1 petaelectronvolt ...
General Physics
May 16, 2013
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Fermi Gamma-ray Space Telescope detects surprise gamma-ray feature beyond our galaxy
Astronomers analyzing 13 years of data from NASA's Fermi Gamma-ray Space Telescope have found an unexpected and as yet unexplained feature outside of our galaxy.
Astronomy
Jan 11, 2024
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Fermi mission links nearby pulsar's gamma-ray 'halo' to antimatter puzzle
NASA's Fermi Gamma-ray Space Telescope has discovered a faint but sprawling glow of high-energy light around a nearby pulsar. If visible to the human eye, this gamma-ray "halo" would appear about 40 times bigger in the sky ...
Astronomy
Dec 19, 2019
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Gamma-ray telescopes reveal a high-energy trap in our galaxy's center
A combined analysis of data from NASA's Fermi Gamma-ray Space Telescope and the High Energy Stereoscopic System (H.E.S.S.), a ground-based observatory in Namibia, suggests the center of our Milky Way contains a "trap" that ...
Astronomy
Jul 18, 2017
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New Gamma-Ray Burst Smashes Cosmic Distance Record (w/Video)
(PhysOrg.com) -- NASA's Swift satellite and an international team of astronomers have found a gamma-ray burst from a star that died when the universe was only 630 million years old, or less than five percent of its present ...
Astronomy
Apr 28, 2009
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In tree rings, Japanese scientists find 8th-century mystery
In the late eighth century, Earth was hit by a mystery blast of cosmic rays, according to a Japanese study that found a relic of the powerful event in cedar trees.
Earth Sciences
Jun 4, 2012
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Three extremely luminous gamma-ray sources discovered in Milky Way's satellite galaxy
Once again, the High Energy Stereoscopic System, H.E.S.S., has demonstrated its excellent capabilities. In the Large Magellanic Cloud, it discovered most luminous very high-energy gamma-ray sources: three objects of different ...
Astronomy
Jan 23, 2015
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