NASA’s Fermi Spots a Weird Pulse of High-Energy Radiation Racing Toward Earth
On August 26, 2020, NASA’s Fermi Gamma-ray Space Telescope detected a pulse of high-energy radiation that had been racing toward Earth for nearly half the…
Gamma Ray
Astrophysicists Solve a Mysterious Decades-Long Gamma-Ray Burst Puzzle
Astrophysicists from the University of Bath in the UK find the magnetic field in gamma-ray bursts is scrambled after the ejected material crashes into, and…
Best View Yet of Exceptional Cosmic Explosion – Challenges Established Theory of Gamma-Ray Bursts in the Universe
Observation challenges established theory of gamma-ray bursts in the universe. Scientists have gained the best view yet of the brightest explosions in the universe: A…
Mysterious Gamma-Ray Heartbeat Coming From Cosmic Gas Cloud Leaves Scientists Baffled – “As Unexpected as Amazing”
Cosmic gas cloud blinks in sync with circling black hole. Scientists have detected a mysterious gamma-ray heartbeat coming from a cosmic gas cloud. The inconspicuous…
Astrophysicists Shocked by Short Gamma Ray Burst Afterglow 10 Billion Light Years Away
Rare event occurred 10 billion lightyears away, 3.8 billion years after the Big Bang SGRB181123B is the most distant short gamma ray burst with its…
NASA Brings Galactic Cosmic Rays to Earth to Study Biological Effects and Health Risks
To better understand and mitigate the health risks faced by astronauts from exposure to space radiation, we ideally need to be able to test the…
What Powers the Most Energetic Explosions in the Universe?
The physical process driving Gamma-Ray Bursts might be synchrotron radiation after all. A new analysis of Fermi/GBM archival data of gamma-ray bursts (GRB), the most…
Caught in Afterglow of a Dying Star: Most Powerful Light in the Universe
First Detection of Inverse Compton Emission From Dying Gamma-Ray Burst A dying star emits intense flashes of light called a gamma-ray burst. Most days, the…
Powerful Pulsating Gamma Rays Emitted From Neutron Star Rotating an Incredible 707 Times a Second
Second fastest spinning radio pulsar known is a gamma-ray pulsar, too. Multi-messenger observations look closely at the system and raise new questions. An international research…
Astronomers Pinpoint Origin of Photons in Mysterious Gamma-Ray Bursts
Scientists from the RIKEN Cluster for Pioneering Research and collaborators have used simulations to show that the photons emitted by long gamma-ray bursts–one of the…
Astronomers Study Enduring ‘Radio Rebound’ from Gamma-Ray Burst 161219B
In the blink of an eye, a massive star more than 2 billion light-years away lost a million-year-long fight against gravity and collapsed, triggering a…
Research Shows Gamma-Ray Bursts Follow Binary Neutron Star Mergers
Researchers at Oregon State University have confirmed that last fall’s union of two neutron stars did in fact cause a short gamma-ray burst. The findings,…
New Model Supports Connection Between Gamma Ray Bursts and Supernovae
A “core-collapse” supernova occurs when the iron core of a massive star collapses under the force of gravity and then rebounds, generating pressure waves and…
New Theory Reveals Unified Origin for Extreme-Energy Space Particles
New model connects the origins of very high-energy neutrinos, ultrahigh-energy cosmic rays, and high-energy gamma rays with black-hole jets embedded in their environments. One of…
How Gamma-Rays from Lightning Produce Radioisotopes and Positrons
A storm system approaches: the sky darkens, and the low rumble of thunder echoes from the horizon. Then without warning… Flash! Crash! — lightning has…
HAWC Collaboration Sheds Light on Antimatter Puzzle
A mountaintop observatory about four hours east of Mexico City, built and operated by an international team of scientists, has captured the first wide-angle view…
Astronomers Reveal a High-Energy Trap in Our Galaxy’s Center
New research reveals that the center of our Milky Way contains a “trap” that concentrates some of the highest-energy cosmic rays. A combined analysis of…
Fermi Discovers A Luminous Gamma-Ray Binary
Dive into the Large Magellanic Cloud and see a visualization of LMC P3, an extraordinary gamma-ray binary system discovered by NASA’s Fermi Gamma-ray Space Telescope….