Quantcast
Last updated on April 17, 2014 at 21:23 EDT

Latest Cosmic ray Stories

2010-02-11 16:56:34

Physicists may have glimpsed a particle that is a leading candidate for mysterious dark matter but say conclusive evidence remains elusive. A 9-year search from a unique observatory in an old iron mine 2,000 feet underground has yielded two possible detections of weakly interacting massive particles, or WIMPs. But physicists, who include two University of Florida researchers, say there is about a one in four chance that the detections were merely background noise -- meaning that a worldwide...

05eb230206e60ea5065e9b0a2c3954781
2009-12-23 13:41:57

The solar system is passing through an interstellar cloud that physics says should not exist. In the Dec. 24th issue of Nature, a team of scientists reveal how NASA's Voyager spacecraft have solved the mystery. "Using data from Voyager, we have discovered a strong magnetic field just outside the solar system," explains lead author Merav Opher, a NASA Heliophysics Guest Investigator from George Mason University. "This magnetic field holds the interstellar cloud together and solves the...

af2c2c2b331c958c47ea12abaa7bcde7
2009-12-07 15:51:44

Scientists say incidents are likely rare and more research is needed New information about lightning-emitted X-rays, gamma rays and high-energy electrons during thunderstorms is prompting scientists to raise concerns about the potential for airline passengers and crews to be exposed to harmful levels of radiation. Scientists at the Florida Institute of Technology, University of California, Santa Cruz and the University of Florida have estimated that airplane passengers could be exposed to a...

9ba86059dca887afedc3c4a7dd4b2d38
2009-12-07 11:25:00

Washington University physicists are closing in on the origin of cosmic rays A thin rain of charged particles continually bombards our atmosphere from outer space. The mysterious particles were first detected 100 years ago but until 10 years ago when a new type of telescope began to come online physicists weren't sure where the "cosmic rays" came from or how they were generated. They suspected the particles were accelerated by supernova shockwaves, but suspicions aren't proof. Imaging...

19d4c814001b8c41304bc6f6cacdb0d6
2009-11-02 14:05:00

Nearby galaxies undergoing a furious pace of star formation also emit lots of gamma rays, say astronomers using NASA's Fermi Gamma-ray Space Telescope. Two so-called "starburst" galaxies, plus a satellite of our own Milky Way galaxy, represent a new category of gamma-ray-emitting objects detected both by Fermi and ground-based observatories. "Starburst galaxies have not been accessible in gamma rays before," said Fermi team member Seth Digel, a physicist at SLAC National Accelerator...

d94ccd1e5576dac54eb88f548552302a
2009-11-02 10:37:07

Nearly 100 years ago, scientists detected the first signs of cosmic rays - subatomic particles (mostly protons) that zip through space at nearly the speed of light. The most energetic cosmic rays hit with the punch of a 98-mph fastball, even though they are smaller than an atom. Astronomers questioned what natural force could accelerate particles to such a speed. New evidence from the VERITAS telescope array shows that cosmic rays likely are powered by exploding stars and stellar "winds."...

2009-10-23 15:42:00

BLOOMFIELD HILLS, Mich., Oct. 23 /PRNewswire/ -- Nobel prize winning scientist Dr. James W. Cronin on Thursday night told an audience of over 100 people of a major ongoing scientific international project to measure cosmic rays. Dr Cronin, Physics Professor Emeritus at the University of Chicago, has originated a planetary approach to measure and identify the origin of the highest energy cosmic rays in the universe. The effort is seen as helping answer one of the most important...

adcda225d6f1dd0e3bfece40a3e48ca3
2009-10-03 11:13:58

Quite a few distant galaxies turn out to be cosmic delivery rooms. Large numbers of massive stars are born in the hearts of these starburst galaxies, and later explode as supernovae. In the remnants they leave behind, particles are accelerated to very high energies. Astrophysicists have now used the H.E.S.S. telescopes to make detailed measurements of the gamma rays from the NGC 253 galaxy. As predicted, these high-energy rays originate from the region of maximum supernova activity close to...

7b25a4ce31afd4a27b8fc14123bf5b4a1
2009-09-25 09:40:00

A team of researchers from the University of Zaragoza (UNIZAR) and the Institut d'Astrophysique Spatiale (IAS, in France) has developed a "scintillating bolometer", a device that the scientists will use in efforts to detect the dark matter of the Universe, and which has been tested at the Canfranc Underground Laboratory in Huesca, Spain. "One of the biggest challenges in Physics today is to discover the true nature of dark matter, which cannot be directly observed "“ even though it...

a3f51d6dadcd6bdcc069e92cac0fbb0f1
2009-08-15 08:05:00

NASA's space shuttle program is winding down. With only about half a dozen more flights, shuttle crews will put the finishing touches on the International Space Station (ISS), bringing to an end twelve years of unprecedented orbital construction. The icon and workhorse of the American space program will have finished its Great Task. But, as Apple's CEO Steve Jobs might say, there is one more thing... An act of Congress in 2008 added another flight to the schedule near the end of the program....


Latest Cosmic ray Reference Libraries

45_cdbc4d69ba819105e29a44f507ff8e90
2009-05-14 17:51:56

The IceCube Neutrino Observatory is a neutrino telescope that is currently being built at the Amundsen-Scott South Pole Station. IceCube is being constructed in deep Antarctic ice by deploying thousands of PMTs (photomultiplier tubes) at depths of 4750 to 8000 feet. These spherical optical sensors are deployed on strings of sixty modules each, into holes melted by hot water drilling. Since 2005, 59 strings have been deployed and installation is expected to be complete by 2011. The strings are...

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...

More Articles (2 articles) »