Gamma Ray Burst
Gamma Ray Bursts (GRBs) are the most violent explosions in the Universe, with some releasing more energy in 10 seconds than what the Sun will emit in its entire 10 billion year lifetime! ...
Gamma Ray Bursts - The Most Powerful Objects in the Universe?
The locations of all 2704 Gamma Ray Bursts detected by BATSE in the 9 year mission.
Click on image for full size
NASA, Compton Gamma Ray Observatory, BATSE Team ...
Gamma Ray Bursts
Gamma ray bursts (GRBs) are short-lived flares of gamma rays originating from deep space. They were discovered accidentally in the 1960s and since then have been the target of intense research and speculation by astronomers.
Gamma rays (denoted as γ) are electromagnetic radiation of high energy. They are produced by sub-atomic particle interactions, such as electron-positron annihilation, radioactive decay or inverse Compton scattering in astrophysical processes.
Gamma ray "mystery" not related to dark matter
DR EMILY BALDWIN
ASTRONOMY NOW
Posted: JULY 10, 2009 ...
Gamma Rays
Gamma rays or gamma-ray are forms of electromagnetic radiation (EMR) or light emissions of a specific frequency produced from sub-atomic particle interaction, such as electron-positron annihilation and radioactive decay; ...
Gamma Ray Burster
Gamma ray bursts were first detected by U. S. military Vela satellites launched in 1963 to monitor Soviet compliance with the nuclear test ban treaty.
A gamma ray was, originally, a photon emitted by a radioactive substance. This has been generalised by physicists to mean any high-energy photon.
Definition: gamma ray: The highest energy, shortest wavelength electromagnetic radiations. Usually, they are thought of as any photons having energies greater than about 100 keV. (It's "gamma-ray" when used as an adjective.) ...
Gamma ray
Wikipedia, the free encyclopedia - Cite This Source
Gamma rays or gamma-ray (denoted as γ) are forms of electromagnetic radiation (EMR) or light emissions of a specific frequency produced from sub-atomic particle interaction, ...
- Gamma Ray Interview - Dirk Schlacter Interview - Interview With Dirk Schlacter Of Gamma Ray
- Radioisotopes from Space
- Space Infrared Telescope Facility Lifts Off ...
The gamma rays produced in the Earth's atmosphere were detected by Compton's Energetic Gamma-Ray Experiment Telescope (EGRET) instrument. In fact, 60 percent of the gamma rays detected by EGRET were from Earth and not deep space.
gamma ray Region of the electromagnetic spectrum, far beyond the visible spectrum, corresponding to radiation of very high frequency and very short wavelength.
GAMMA RAYS (γ-RAYS) - Most energetic form of radiation, similar to x-rays and light, except with shorter wavelengths (<0.01 nm) and higher energies (>105 eV).
gamma rays
the form of light (electromagnetic radiation) with the shortest wavelength and the most energy
gamma-ray burst ...
Gamma rays: the type of radiation that has the shortest wavelength and the highest energy. Some radioactive materials give off gamma rays.
Gamma Rays. High energy radiation (energies in excess of 100 keV) observed during large, extremely energetic solar flares.
Gauss. The unit of magnetic induction in the cgs (centimeter-gram-second) system.
Gamma Ray
(a) Electromagnetic radiation similar to X-radiation, although of shorter wavelength, emitted spontaneously by some radioactive substances from atomic nuclei during radioactive decay.
Gamma ray: Gamma rays are like the light we see with our eyes, the x-rays used to probe our bodies in search of problems, and the radio waves that our television sets translate into inane shows.
Gamma rays -- Electromagnetic radiation in the neighborhood of 100 femtometers wavelength.
GCF -- Ground Communications Facilities, provides data and voice communications between JPL and the three DSCCs.
Gamma ray bursts--brief bursts of gamma rays from the distant universe, observed by satellites.
Gamma rays--electromagnetic waves of the highest frequencies known, originally discovered as an emission of radioactive substances.
gamma ray
Radiation with the highest amount of energy.
gamma-ray burst
A random burst of energy from distant objects in the form of gamma rays. Gamma-ray bursts release an enormous amount of energy and are not clearly understood.
Gamma Ray
the highest energy (shortest wavelength) photons in the electromagnetic spectrum. Gamma rays are often defined to begin at 10 keV, although radiation from around 10 keV to several hundred keV is also referred to as hard x-rays.
Gamma Ray - The part of the electromagnetic spectrum having the shortest wavelengths
Geocentric - Centered on the Earth. In a geocentric model of the solar system, the planets moved about the Earth ...
Gamma Ray Bursts - In terms of gamma rays, a Magnetar (a type of neutron star) called SGR 1806-20, had an extreme burst on 27 December 2004.
GAMMA RAY BURST
Gamma ray bursts are mysterious and powerful astronomical phenomenon that emit short-lived flashes of gamma rays (extremely high-energy radiation).
Gamma rays
After hard X-rays come gamma rays. These are the most energetic photons, having no lower limit to their wavelength.
Gamma rays- the highest energy, shortest wavelength electromagnetic radiation of all
Gegenschein- a round or elongated spot of light in the sky at a point 180 degrees from the sun; also called counter glow ...
Gamma rays are difficult to observe from ground-based telescopes due to atmospheric interference, and high-altitude balloons, sounding rockets, and orbiting observatories are therefore used.
Gamma rays have too high an energy to be focussed with even the shallow angle reflecting technique, so gamma ray telescopes simply point in a desired direction and count the number of photons coming from that direction.
Gamma rays High energy electromagnetic radiation (in excess of 100 keV) which can be generated by nuclear reactions in space. This is an image of the EGRET gamma ray all-sky survey - above 100 MeV.
More about gamma rays in "Imagine the Universe!"...
Gamma Rays
Now Showing at the YPOP Theater!
Scientists look at the Sun with special telescopes that are able to see only specific colors of light -- even the wavelengths that are invisible to your eye.
gamma ray - (n.)
high-energy electromagnetic particle or photon, especially as emitted by a nucleus in its transition from one energy level to another.
Gamma ray
Earth's atmosphere opaque to gamma rays, so observations must be made from space
Neutron stars (22) ...
Gamma ray bursts are mysterious and powerful astronomical phenomenon that emit short-lived flashes of gamma rays (extremely high-energy radiation). These bursts last only up to a few seconds, occur every day, and come from different parts of the sky.
gamma ray Region of the electromagnetic spectrum, beyond x-rays, corresponding to radiation of very high frequency and very short wavelength. [More Info] ...
Gamma Rays
Light with the shortest wavelengths and the highest energies and frequencies in the electromagnetic spectrum; also called gamma radiation.
Gravitational Redshift ...
Gamma rays: Very high frequency electromagnetic radiation.
Ganymede: Galilean moon of Jupiter.
Gaspra: An asteroid ...
Gamma ray
Extremely short-wavelength, and energetic electromagnetic radiation.
Geocentric ...
The gamma ray spectrometer and the neutron spectrometer will return global data on elemental abundances, which will be used to help understand the evolution of the lunar highland crust and the duration and extent of basaltic volcanism, ...
COMPTON GAMMA RAY OBSERVATORY
The Compton Gamma Ray Observatory (CGRO) is an orbiting telescope that NASA launched in 1991. It observes the electromagnetic spectrum from 30 keV to 30 GeV. The CGRO led to the discovery of blazars.
GRS, the Gamma Ray Spectrometer looking at the gamma-ray part of the spectrum for the presence of 20 elements from the periodic table such as carbon, silicon, iron or magnesium.
1H + 2H --- 3He + gamma ray
Energy is carried off by the gamma ray photon. When enough Helium 3 atoms have accumulated they can combine to form one Helium 4 (which is what we regard as ordinary Helium) plus two protons (hydrogen) ...
pair production An absorption process for X-ray and gamma ray radiation in which the incident photon is annihilated in the vicinity of the nucleus of the absorbing atom, with subsequent production of an electron and positron pair.
Compare beta particle, gamma ray. alpha particle (Plasma Physics and Fusion Energy Glossary) The nucleus of a Helium-4 atom; is a typical product of fusion reactions; also released in various nuclear decay processes.
Electromagnetic Spectrum The entire range of all the various kinds or wavelengths of electromagnetic radiation, including (from short to long wavelengths) gamma rays, x-rays, ultraviolet, optical (visible), infrared, and radio waves.
The high temperatures of the contracting core also produce gamma rays which smash the iron nuclei to bits, undoing in a tenth of a second all the nuclear fusion that went on before.
When a particle and its antiparticle come together, they can always annihilate to form gamma rays. The antiparticle of an electrically neutral particle is sometimes the same as the original particle (e.g., photons) and sometimes it is distinct (e.g.
For example, molecular oxygen (O2), ozone (O3), and molecular nitrogen (N2) in the Earth's atmosphere are almost perfectly transparent to infrared rays of all frequencies, but they strongly absorb ultraviolet light, X rays, and gamma rays.
One of the greatest difficulties in finding gamma ray bursts is that they are so short-lived. Once a burst is detected, it takes too long to rotate a satellite to face the burst and collect data.
What does this mind-stretching idea of stretching space mean for our gamma rays? The gamma rays are waves of energy moving through space. As space stretches, the waves that are in space must stretch too. Stretched gamma rays are called x-rays.
Adding to the mystery, in 1994 the orbiting Compton Gamma Ray Observatory picked up gamma-ray flashes from the upper atmosphere that also seemed to be synchronized to the storms, ...
Flares release energy in many forms - electro-magnetic (Gamma rays and X-rays), energetic particles (protons and electrons), and mass flows. Flares are characterized by their brightness in X-rays (X-Ray flux). The biggest flares are X-Class flares.
Infrared and radio waves have longer wavelengths but lower frequencies; ultraviolet and gamma ray have shorter wavelengths and higher frequencies. The graph below shows the opacity of our atmosphere to EM waves in different frequencies.
The fading fireball of a gamma-ray burst - a sudden burst of gamma rays from deep space - that is observable in less energetic wavelengths, such as X-ray, optical, and radio.
The Compton Gamma Ray Observatory
Chandrasekhar limit (S. Chandrasekhar; 1930)
A limit which mandates that no white dwarf (a collapsed, degenerate star) can be more massive than about 1.4 solar masses.
The energy made in the core is in the form of photons, more specifically in gamma rays, when it first begins its journey outward. This energy is changed into less energetic photons as it moves through the radiative zone.
gamma-ray burster: An object that produces a sudden burst of gamma rays; thought to be associated with neutron stars and black holes.
gas tail (type I): The tail of a comet produced by gas blown outward by the solar wind. (See dust tail.) ...
Each second about 700,000,000 tons of hydrogen are converted to about 695,000,000 tons of helium and 5,000,000 tons (=3.86e33 ergs) of energy in the form of gamma rays.
A source of bursts of X-rays or in some cases, gamma rays; believed to be associated with neutron stars.
C
Capture Hypothesis ...
 See also: Energy, Rays, Light, Ray, Earth
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