Earth gets blasted by mild short gamma-ray bursts (GRBs) most days. But sometimes, a giant flare like GRB 200415A arrives at our galaxy, sweeping along energy that dwarfs our sun. In fact, the most powerful explosions in ...
Astronomy
Jan 13, 2021
0
79
A Clemson University scientist has joined forces with an international team of astronomers to identify periodic gamma-ray emissions from 11 active galaxies, paving the way for future studies of unconventional galaxies that ...
Astronomy
Jun 19, 2020
8
1837
A pair of gigantic gamma-ray bubbles centered on the core of the Milky Way galaxy were discovered by the Fermi Gamma-ray Space Telescope 10 years ago. But how these so-called "Fermi bubbles" arose was a mystery.
Astronomy
May 15, 2020
25
378
An international research team led by the Max Planck Institute for Gravitational Physics (Albert Einstein Institute; AEI) in Hannover has discovered that the radio pulsar J0952-0607 also emits pulsed gamma radiation. J0952-0607 ...
Astronomy
Sep 19, 2019
17
2342
An active galaxy nucleus (AGN) contains a supermassive black hole that is vigorously accreting material. It typically ejects jets of particles that move at close to the speed of light, radiating across many wavelengths, in ...
Astronomy
Jul 9, 2019
5
620
Five billion years ago, a great disturbance rocked a region near the monster black hole at the center of galaxy 3C 279. On June 14, the pulse of high-energy light produced by this event finally arrived at Earth, setting off ...
Astronomy
Jul 10, 2015
0
3876
Astronomers are predicting a close encounter between a stellar remnant the size of a city and one of the brightest stars in the Milky Way.
Astronomy
Jul 2, 2015
0
2657
Each day, thunderstorms around the world produce about a thousand quick bursts of gamma rays, some of the highest-energy light naturally found on Earth. By merging records of events seen by NASA's Fermi Gamma-ray Space Telescope ...
Space Exploration
Dec 15, 2014
7
0
An international team of astronomers, using NASA's Fermi observatory, has made the first-ever gamma-ray measurements of a gravitational lens, a kind of natural telescope formed when a rare cosmic alignment allows the gravity ...
Astronomy
Jan 6, 2014
7
0
Researchers from the Laboratoire Leprince-Ringuet (CNRS/École Polytechnique) have carried out the first measurement of the intensity of the diffuse extragalactic background light in the nearby Universe, a fog of photons ...
Astronomy
Jan 20, 2013
2
0
