News tagged with gamma
NASA small explorer mission celebrates ten years and forty thousand X-ray flares
(PhysOrg.com) -- On February 5, 2002, NASA launched what was then called the High Energy Solar Spectroscopic Imager (HESSI) into orbit. Renamed within months as the Ramaty High Energy Solar Spectroscopic Imager ...
Space & Earth / Space Exploration
Feb 09, 2012 |
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Fermi telescope explores new energy extremes
(PhysOrg.com) -- After more than three years in space, NASA's Fermi Gamma-ray Space Telescope is extending its view of the high-energy sky into a largely unexplored electromagnetic range. Today, the Fermi ...
Jan 10, 2012 |
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Fermi shows that Tycho's star shines in gamma rays
(PhysOrg.com) -- In early November 1572, observers on Earth witnessed the appearance of a "new star" in the constellation Cassiopeia, an event now recognized as the brightest naked-eye supernova in more than ...
Dec 13, 2011 |
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Dawn spacecraft spirals down to lowest orbit
(PhysOrg.com) -- NASA's Dawn spacecraft successfully maneuvered into its closest orbit around the giant asteroid Vesta today, beginning a new phase of science observations. The spacecraft is now circling Vesta ...
Space & Earth / Space Exploration
Dec 13, 2011 |
4.6 / 5 (8) |
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Discordance among commercially-available diagnostics for latent TB infection
In populations with a low prevalence of tuberculosis (TB), the majority of positives with the three tests commercially available in the U.S for the diagnosis of TB are false positives, according to a new study.
Dec 09, 2011 |
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Neuroscientists boost memory using genetics and a new memory-enhancing drug
When the activity of a molecule that is normally elevated during viral infections is inhibited in the brain, mice learn and remember better, researchers at Baylor College of Medicine reported in a recent article in the journal ...
Medicine & Health / Neuroscience
Dec 08, 2011 |
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Probiotics reduce infections for patients in intensive care
Traumatic brain injury is associated with a profound suppression of the patient's ability to fight infection. At the same time the patient also often suffers hyper-inflammation, due to the brain releasing glucocorticoids ...
Dec 02, 2011 |
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Swift finds a gamma-ray burst with a dual personality (w/ video)
(PhysOrg.com) -- A peculiar cosmic explosion first detected by NASA's Swift observatory on Christmas Day 2010 was caused either by a novel type of supernova located billions of light-years away or an unusual ...
Nov 30, 2011 |
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One promising puzzle piece for confirming dark matter now seems unlikely fit
Like jazz musicians who make up a melody as they go along, scientists often improvise even after an experiment is underway. One recent example of this comes from the Fermi Gamma-ray Space Telescope. Launched ...
Nov 28, 2011 |
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Physicists set strongest limit on mass of dark matter
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 Le ...
Nov 23, 2011 |
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Physicists scrutinize the universe with a novel camera
(PhysOrg.com) -- For the first time, a telescope has been equipped with a camera based on a new technology that uses semiconductors. This instrument will observe the flashes of light that are produced by gamma ...
Space & Earth / Space Exploration
Nov 07, 2011 |
5 / 5 (7) |
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NASA's Fermi finds youngest millisecond pulsar, 100 pulsars to date
An international team of scientists using NASA's Fermi Gamma-ray Space Telescope has discovered a surprisingly powerful millisecond pulsar that challenges existing theories about how these objects form.
Nov 04, 2011 |
4.3 / 5 (6) |
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The high energy crab
(PhysOrg.com) -- The Crab Nebula is the remnant of a supernova. Its precursor star exploded in 1054 AD in an event that was recorded by Chinese and (quite probably) Anasazi Indian astronomers. It is called ...
Oct 31, 2011 |
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Stories of missions past: Early explorers
(PhysOrg.com) -- On September 29, 2011, NASA announced the short list for five potential new "Explorer class" spacecraft. These missions are by definition small and relatively inexpensive, designed to be led ...
Space & Earth / Space Exploration
Oct 27, 2011 |
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600 mysteries in the night sky
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 ...
Oct 19, 2011 |
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