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Latest Fermi Gamma-ray Space Telescope Stories

Physicists Set Strongest Limit On Mass Of Dark Matter
2011-11-25 04:21:29

Brown University physicists have set the strongest limit for the mass of dark matter, the mysterious particles believed to make up nearly a quarter of the universe. The researchers report in Physical Review Letters that dark matter must have a mass greater than 40 giga-electron volts. The distinction is important because it casts doubt on recent results from underground experiments that have reported detecting dark matter. If dark matter exists in the universe, scientists now have set the...

Image 1 - Scientists Discover Powerful Millisecond Pulsar
2011-11-03 14:24:14

[ Video 1 ] | [ Video 2 ] | [ Video 3 ] NASA said on Thursday that its scientists have discovered a surprisingly powerful millisecond pulsar that challenges existing theories. The international team of scientists used NASA's Fermi Gamma-ray Space Telescope to find that the object is the most luminous pulsar detected in the galaxy cluster to date, spinning at 11,000 rotations per minute. The researchers wrote in the November 3 issue of the journal Science that the pulsar is only 25...

Image 1 - Gamma-ray Burst Reveals Surprising Ingredients Of Early Galaxies
2011-11-02 05:50:51

An international team of astronomers has used the brief but brilliant light of a distant gamma-ray burst as a probe to study the make-up of very distant galaxies. Surprisingly the new observations, made with ESO´s Very Large Telescope, have revealed two galaxies in the young Universe that are richer in the heavier chemical elements than the Sun. The two galaxies may be in the process of merging. Such events in the early Universe will drive the formation of many new stars and may be the...

2011-11-01 03:39:55

NASA will hold a media teleconference at 2 p.m. EDT on Thursday, Nov. 3, to discuss new discoveries about pulsars by the Fermi Gamma-ray Space Telescope. A pulsar is the closest thing to a black hole astronomers can observe directly. Pulsars are capable of crushing half a million times more mass than Earth into a sphere no larger than a city. Some of these objects spin tens of thousands of revolutions per minute, faster than the blades of a kitchen blender. Participants are: - Paulo...

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2011-10-18 09:45:39

[ Watch the Video ] NASA's Fermi team recently released the second catalog of gamma-ray sources detected by their satellite's Large Area Telescope (LAT). Of the 1873 sources found, nearly 600 are complete mysteries. No one knows what they are. "Fermi sees gamma rays coming from directions in the sky where there are no obvious objects likely to produce gamma rays," says David Thompson, Fermi Deputy Project Scientist from Goddard Space Flight Center. Gamma rays are by their very nature...

Image 1 - Fermi Census Highlights Cosmic Mysteries
2011-09-11 04:32:43

  Every three hours, NASA's Fermi Gamma-ray Space Telescope scans the entire sky and deepens its portrait of the high-energy universe. Every year, the satellite's scientists reanalyze all of the data it has collected, exploiting updated analysis methods to tease out new sources. These relatively steady sources are in addition to the numerous transient events Fermi detects, such as gamma-ray bursts in the distant universe and flares from the sun. Earlier this year, the Fermi team...

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2011-06-30 06:57:38

In December 2010, a pair of mismatched stars in the southern constellation Crux whisked past each other at a distance closer than Venus orbits the sun. The system possesses a so-far unique blend of a hot and massive star with a compact fast-spinning pulsar. The pair's closest encounters occur every 3.4 years and each is marked by a sharp increase in gamma rays, the most extreme form of light. The unique combination of stars, the long wait between close approaches, and periods of intense...

2011-05-20 14:29:00

WASHINGTON, May 20, 2011 /PRNewswire-USNewswire/ -- An international team, including NASA-funded researchers, using radio telescopes located throughout the Southern Hemisphere, has produced the most detailed image of particle jets erupting from a supermassive black hole in a nearby galaxy. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) "These jets arise as infalling matter approaches the black hole, but we don't yet know the details of how they form and maintain...

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2011-05-20 14:30:00

An international team, including NASA-funded researchers, using radio telescopes located throughout the Southern Hemisphere has produced the most detailed image of particle jets erupting from a supermassive black hole in a nearby galaxy. "These jets arise as infalling matter approaches the black hole, but we don't yet know the details of how they form and maintain themselves," said Cornelia Mueller, the study's lead author and a doctoral student at the University of Erlangen-Nuremberg in...


Word of the Day
monteith
  • A large punch-bowl of the eighteenth century, usually of silver and with a movable rim, and decorated with flutings and a scalloped edge. It was also used for cooling and carrying wine-glasses.
  • A kind of cotton handkerchief having white spots on a colored ground, the spots being produced by a chemical which discharges the color.
This word is possibly named after Monteith (Monteigh), 'an eccentric 17th-century Scotsman who wore a cloak scalloped at the hem.'
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