Latest Gamma ray Stories

Dark Lightning And Visible Lightning May Be Connected
2013-04-25 11:02:17

Watch the video "Scientists Detect Dark Lightning Linked To Visible Lightning" Brett Smith for redOrbit.com - Your Universe Online Discovered in 1991, dark lightning is an electrical phenomenon that occurs deep within a thunderhead and is responsible for producing a powerful burst of radio waves and gamma rays. Now, new research from an international team of scientists has found that dark lightning and visible lightning may be connected, according to a report in Geophysical...

Most Distant Source Of High-Energy Gamma Rays Comes From Distant Blazar
2013-04-19 04:57:41

April Flowers for redOrbit.com - Your Universe Online Of all the active galactic nuclei, blazars are the brightest and emit very high-energy gamma rays. A team led by physicists from the University of California, Santa Cruz (UCSC), has made new observations of the blazar known as PKS 1424+240 that reveal it is the most distant known source of very high-energy gamma rays. The emission spectrum of PKS 1424+240 now appears highly unusual in the light of new data. Data from the Hubble Space...

Scientists Unravel The Mysteries Of Large Gamma-Ray Bursts
2013-04-16 13:06:58

WATCH VIDEO: [Swift's Christmas Burst From Blue Supergiant Star Explosion] Lee Rannals for redOrbit.com — Your Universe Online Researchers unwrapped a little more of the mystery surrounding a new type of powerful cosmic explosion, creating a new theory around the death of supergiant stars. These huge explosions create powerful blasts of high energy gamma rays, known as gamma-ray bursts. These larger blasts can last for several hours, compared to most gamma-ray bursts which...

Researchers Explore Dark Lightning
2013-04-11 10:57:42

April Flowers for redOrbit.com - Your Universe Online A group of researchers from Florida Institute of Technology's Department of Physics and Space Science recently asked the somewhat unusual question: "What are the radiation doses to airplane passengers from the intense bursts of gamma-rays that originate from thunderclouds?" Faculty members Joseph Dwyer, Ningyu Liu and Hamid Rassoul discussed the question and their answers concerning terrestrial gamma ray flashes at a press conference...

Where Do Cosmic Rays Come From?
2013-03-01 05:33:26

[ Listen to the Webcast ] John P. Millis, Ph.D. for redOrbit.com — Your Universe Online As we search the heavens, one of the striking observations is that we are constantly bombarded by a stream of extremely high energy charged particles, traveling at nearly the speed of light. Known as Cosmic Rays — composed mostly (90%) of protons with the rest mostly heavy nuclei and a small number of electrons — these particles appear to come from all directions. But where do...

Fermi's Motion Creates A Celestial Spirograph
2013-02-28 12:15:33

NASA [ Watch The Video ] NASA's Fermi Gamma-ray Space Telescope orbits our planet every 95 minutes, building up increasingly deeper views of the universe with every circuit. Its wide-eyed Large Area Telescope (LAT) sweeps across the entire sky every three hours, capturing the highest-energy form of light -- gamma rays -- from sources across the universe. These range from supermassive black holes billions of light-years away to intriguing objects in our own galaxy, such as X-ray...

2013-02-26 10:30:59

-Currently, doctors have no way to accurately measure damage to the body soon after a person is exposed to ionizing radiation. -It is therefore difficult to know whether a person is likely to suffer serious effects after an occupational or accidental exposure. -This animal study shows that radiation exposure alters the levels of certain small molecules in the blood, perhaps offering a reliable measure of damage to the body. Ohio State University cancer researchers have identified...

New Insights Into The Birth And Evolution Of Stars Provided By Gamma Ray Camera
2013-02-05 11:08:45

Science and Technology Facilities Council A major step forward in our understanding of the structure and behavior of some of the most elusive atomic nuclei in existence, some of which occur only briefly on the surface of exploding stars, is now taking place thanks to the first experiments to come from the new Advanced Gamma Tracking Array (AGATA). AGATA has been developed by the STFC´s Nuclear Physics Group, and a group of UK Universities funded by STFC, with the aim of studying...

Black Hole Radiation Blasted Earth During 8th Century
2013-01-21 11:56:25

Lee Rannals for redOrbit.com - Your Universe Online According to a new study, black hole cosmic radiation blasted into the Earth back in the 8th century. Japanese astrophysicist Fusa Miyake discovered last year clues for the strange event located in the rings of ancient cedar trees that dated back to either 774 or 775 AD. Researchers teamed together to determine what had caused the surge in carbon-14 in the rings and found no evidence of a supernova, as they had expected. The...

Latest Gamma ray Reference Libraries

2004-10-19 04:45:43

Gamma-Ray Astronomy -- Gamma-ray astronomy is the astronomical study of gamma rays. Long before experiments could detect gamma rays emitted by cosmic sources, scientists had known that the universe should be producing these photons. Work by Feenberg and Primakoff in 1948, Hayakawa and Hutchinson in 1952, and, especially, Morrison in 1958 had led scientists to believe that a number of different processes which were occurring in the universe would result in gamma-ray emission. These...

2004-10-19 04:45:41

Hypernova -- A hypernova is a theoretical type of supernova produced when exceptionally large stars collapse at the end of their lifespan. In a hypernova, the core of the star collapses directly into a black hole and two extremely energetic jets of plasma are emitted from its rotational poles at nearly light speed. These jets emit intense gamma rays, and are a candidate explanation for gamma ray bursts. Theorists have come up with several plausible explanations for hypernovae. It may...

2004-10-19 04:45:41

Electromagnetic Spectrum -- The electromagnetic spectrum describes the various types of electromagnetic radiation based on their wavelengths. Radio, representing wavelengths from a few feet to well over a mile, is at one end of the spectrum. Gamma ray radiation is at the other end: the wavelength of the harder types is so short, in the subatomic range, that we do not have instruments capable of directly measuring it. While the above classification scheme is generally accurate, in...

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Word of the Day
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'