Latest Gamma ray Stories
WASHINGTON, Nov. 1, 2012 /PRNewswire-USNewswire/ -- Astronomers using data from NASA's Fermi Gamma-ray Space Telescope have made the most accurate measurement of starlight in the universe and used it to establish the total amount of light from all of the stars that have ever shone, accomplishing a primary mission goal. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO ) "The optical and ultraviolet light from stars continues to travel throughout the universe even after...
[ Watch the Video: NASA's Fermi Explores the Early Universe ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers have made the most accurate measurement of starlight in the universe and have used this to establish the total amount of light from all of the stars that have ever shone. A team used data from NASA's Fermi Gamma-Ray Space Telescope to find the total sum of starlight in the universe, or the extragalactic background light (EBL). Gamma rays are the most...
Berkeley Lab’s lead in laser plasma acceleration research continues with new benchmarks for electron beam quality Part One: Focusing in on beam focus The rapidly evolving technology of laser plasma accelerators (LPAs) – called “table-top accelerators” because their length can be measured in centimeters instead of kilometers – promises a new breed of machines, far less expensive and with far less impact on the land and the environment than today’s conventional accelerators....
April Flowers for redOrbit.com - Your Universe Online Radioactive titanium associated with supernova remnant 1987A has been directly detected by ESA's Integral space observatory. The glowing remnant around the exploded star has likely been powered by the decaying from this titanium for the last 20 years. The first space observatory that can simultaneously observe objects in gamma rays, X-rays and visible light, Integral's principal targets are violent explosions known as gamma ray...
This week, ESA’s Integral space observatory celebrates ten years since launch on 17 October 2002. Integral, short for International Gamma-Ray Astrophysics Laboratory, is equipped with two gamma-ray telescopes, an X-ray monitor and an optical camera. All four of Integral’s instruments point simultaneously at the same region of the sky to make complementary observations of high-energy sources. Integral is often bathed in gamma-ray bursts, the death cries of massive stars that have...
TUCSON, Ariz., Oct. 2, 2012 /PRNewswire-USNewswire/ -- Tens of thousands of people have been forced out of their homes in areas surrounding the Fukushima Daiichi nuclear generating station because of fear of radiation exposure. "The stress of evacuation can itself cause death, so it is important not to over-react," states Jane Orient, M.D., president of Physicians for Civil Defense. The question of reasonable criteria for evacuation in the event of a radiation accident was...
April Flowers for redOrbit.com - Your Universe Online Scientists have long believed that spacetime is foamy, like a freshly pulled draft beer, but new information from an intergalactic photo finish shows it might just be as smooth as a single malt whiskey, instead. Robert Nemiroff, a physicist at Michigan Technological University, reached this conclusion after studying the tracings of three photons of differing wavelengths that had been recorded by NASA's Fermi Gamma-ray Space Telescope...
Gamma-ray photons seen emanating from the center of the Milky Way galaxy are consistent with the intriguing possibility that dark-matter particles are annihilating each other in space, according to research submitted by UC Irvine astrophysicists to the American Physical Society journal Physical Review D. Kevork Abazajian, assistant professor, and Manoj Kaplinghat, associate professor, of the Department of Physics & Astronomy analyzed data collected between August 2008 and June 2012...
Lee Rannals for redOrbit.com NASA said that its Fermi Gamma-ray Space Telescope detected the highest-energy light ever associated with an eruption on the sun on March 7. The latest discovery, according to the space agency, is echoing in Fermi's new role as a solar observatory, which is a tool that is being used to understand solar outbursts. The March 7 flare was a class X5.4, and is the strongest eruption so far observed by Fermi's Large Area Telescope (LAT). "For most of Fermi's...
WASHINGTON, June 11, 2012 /PRNewswire-USNewswire/ -- During a powerful solar blast on March 7, NASA's Fermi Gamma-ray Space Telescope detected the highest-energy light ever associated with an eruption on the sun. The discovery heralds Fermi's new role as a solar observatory, a powerful new tool for understanding solar outbursts during the sun's maximum period of activity. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) A solar flare is an explosive blast of light and...
Latest Gamma ray Reference Libraries
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...
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...
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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