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Latest Gamma-ray burst Stories

6ed73c3134c7fc84b775c272eb9cfeae1
2010-11-04 09:15:12

Black holes could produce the enormous energies of a burst, but not neutron stars A gamma-ray burst is an immensely powerful blast of high-energy light thought to be generated by a collapsing star in a distant galaxy, but what this collapse leaves behind has been a matter of debate. A new analysis of four extremely bright bursts observed by NASA's Fermi satellite suggests that the remnant from a long-duration gamma-ray burst is most likely a black hole "“ not a rapidly spinning, highly...

069e738fd2351e0e58cdd94fd1e42993
2010-07-15 10:00:00

There are many cultural myths concerning black holes -- several of the myths are perpetuated by television and movies. Black holes have been portrayed as time-traveling tunnels to another dimension, or as cosmic vacuum cleaners sucking up everything in sight. Black holes are really just the evolutionary end points of massive stars. Somehow, this simple explanation makes them no easier to understand. On Thursday, July 15, NASA scientist Jerry Fishman from NASA's Marshall Space Flight Center...

d68d944035da8d4ac6a889c994fc2c9c
2010-07-14 12:51:06

A blast of the brightest X-rays ever detected from beyond our Milky Way galaxy's neighborhood temporarily blinded the X-ray eye on NASA's Swift space observatory earlier this summer, astronomers now report. The X-rays traveled through space for 5-billion years before slamming into and overwhelming Swift's X-ray Telescope on 21 June.  The blindingly bright blast came from a gamma-ray burst, a violent eruption of energy from the explosion of a massive star morphing into a new black...

2010-05-05 14:20:00

GREENBELT, Md., May 5 /PRNewswire-USNewswire/ -- Dr. Neil Gehrels, an astrophysicist at NASA's Goddard Space Flight Center, has been elected into the National Academy of Sciences (NAS), an honor considered to be one of the highest awarded to scientists and engineers. (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO ) The honor, which also yielded 71 other newly elected members, was announced recently at the 147th annual meeting of the Academy. Dr. Gehrels pioneering...

e9085ee10d9f74a354186c20e1aa6a4c1
2010-04-20 06:55:00

In its first five years in orbit, NASA's Swift satellite has given astronomers more than they could have hoped for. Its discoveries range from a nearby nascent supernova to a blast so far away that it happened when our universe was only 5 percent of its present age. Swift primarily studies gamma-ray bursts (GRBs) -- the biggest and most mysterious explosions in the cosmos. On April 13, the spacecraft's "burst-o-meter" cataloged its 500th GRB. "On the one hand, it's just a number, but on the...

bd840eb4b8f1a3a5f0d7d5404efdf86f1
2010-02-11 07:20:00

Instruments scanning outer space for cataclysmic explosions called gamma-ray bursts are detecting intense flashes of gamma-ray energy right here in the friendly skies of Earth. These terrestrial gamma-ray flashes, or TGFs, blast through thunderstorms close to the altitude where commercial airliners fly. In fact, they could be too close for comfort. In a recent study,* scientists estimated that airline passengers could be exposed to 400 chest X-rays worth of radiation by being near the origin...

2010-01-27 12:43:00

WASHINGTON, Jan. 27 /PRNewswire-USNewswire/ -- Astronomers studying two exploding stars, or supernovae, have found evidence the blasts received an extra boost from newborn black holes. The supernovae were found to emit jets of particles traveling at more than half the speed of light. (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO ) Previously, the only catastrophic events known to produce such high-speed jets were gamma-ray bursts, the universe's most luminous explosions....

0df6c677b3752b72366b90f020a6aec51
2010-01-27 12:53:04

Astronomers studying two exploding stars, or supernovae, have found evidence the blasts received an extra boost from newborn black holes. The supernovae were found to emit jets of particles traveling at more than half the speed of light. Previously, the only catastrophic events known to produce such high-speed jets were gamma-ray bursts, the universe's most luminous explosions. Supernovae and the most common type of gamma-ray bursts occur when massive stars run out of nuclear fuel and...

c0a0ddae1545d1fd59cebd3e781bf16e1
2010-01-27 12:44:30

For the first time, astronomers have found a supernova explosion with properties similar to a gamma-ray burst, but without seeing any gamma rays from it. The discovery, using the National Science Foundation's Very Large Array (VLA) radio telescope, promises, the scientists say, to point the way toward locating many more examples of these mysterious explosions. "We think that radio observations will soon be a more powerful tool for finding this kind of supernova in the nearby Universe than...

a8c74b56011226d61914c0795b40ebd7
2009-12-09 14:45:00

A specialized camera on a telescope operated by U.K. astronomers from Liverpool has made the first measurement of magnetic fields in the afterglow of a gamma-ray burst (GRB). The result is reported in the Dec. 10 issue of Nature magazine by the team of Liverpool John Moores University (LJMU) astronomers who built and operate the telescope and its unique scientific camera, named RINGO. The burst occurred January 2, 2009. NASA's Swift satellite observed its position and immediately notified...


Latest Gamma-ray burst Reference Libraries

7_7ab115b117284658644e345b89f5ba712
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...

6_f3739d4b04b11a1c267bfcc286610ef92
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...

6_f5324ad7d5514381282c99963af8be7c2
2004-10-19 04:45:41

Gamma-Ray Burst -- In astronomy, Gamma-ray bursters (GRBs) are flashes of gamma rays that last from seconds to hours, the longer ones being followed by several days of X-ray afterglow. They occur at random positions in the sky several times each day. They are now believed to result from tremendous explosions in far away galaxies, during the creation of a black hole from a dying star or two colliding neutron stars. The black hole, surrounded by a rotating disk of matter falling into it,...

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Word of the Day
reremouse
  • A bat.
The word 'reremouse' comes from Middle English reremous, from Old English hrēremūs, hrērmūs ("bat"), equivalent to rear (“to move, shake, stir”) +‎ mouse.
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