How dangerous are nearby supernovae to life on Earth?
Life and supernovae don't mix.
Astronomy
Oct 27, 2022
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Page 6 - News tagged with cosmic gamma rays
How close is too close to a kilonova?
Cataclysmic events happen in the universe all the time. Black hole mergers, supernovae, gamma-ray bursts, and a whole host of others. Most of them happen in distant galaxies, so they pose no threat to us. But there are a ...
Astronomy
Oct 24, 2023
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Moon glows brighter than sun in images from NASA's Fermi
If our eyes could see high-energy radiation called gamma rays, the Moon would appear brighter than the Sun! That's how NASA's Fermi Gamma-ray Space Telescope has seen our neighbor in space for the past decade.
Space Exploration
Aug 15, 2019
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Cosmic debris: Study looks inside the universe's most powerful explosions
A new study provides an inside look at the most powerful explosions in the universe: gamma-ray bursts.
Astronomy
Apr 10, 2015
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Quasar jets are particle accelerators thousands of light-years long
An international collaboration bringing together over 200 scientists from 13 countries has shown that the very high-energy gamma-ray emissions from quasars, galaxies with a highly energetic nucleus, are not concentrated in ...
Astronomy
Jun 17, 2020
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Neutrinos put cosmic ray theory on ice
(Phys.org) -- A telescope buried beneath the South Pole has failed to find any neutrinos accompanying exploding fireballs in space, undermining a leading theory of how cosmic rays are born.
Astronomy
Apr 20, 2012
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New gamma-ray observatory begins operations at Sierra Negra volcano
The High-Altitude Water Cherenkov (HAWC) Gamma Ray Observatory has begun formal operations at its site in Mexico. HAWC is designed to study the origin of very high-energy cosmic rays and observe the most energetic objects ...
Astronomy
Aug 21, 2013
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Super-tiger backgrounder: The case of the cosmic rays
(Phys.org)—Grade-school science teachers sometimes hand out "mystery boxes" containing ramps, barriers and a loose marble. By rotating the boxes and feeling the marble hang up or drop, the students try to deduce what's ...
Astronomy
Dec 27, 2012
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Airborne pods seek to trace nuclear bomb's origins: Modular units crossing 'Valley of Death' for Air Force use
(Phys.org)—If a nuclear device were to unexpectedly detonate anywhere on Earth, the ensuing effort to find out who made the weapon probably would be led by aircraft rapidly collecting airborne radioactive particles for ...
Engineering
Jan 10, 2013
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VERITAS supplies critical piece to neutrino discovery puzzle
The VERITAS array has confirmed the detection of high-energy gamma rays from the vicinity of a supermassive black hole located in a distant galaxy, TXS 0506+056. While these detections are relatively common for VERITAS, this ...
Astronomy
Jul 12, 2018
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