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Latest Cosmic rays Stories

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2009-05-04 11:05:00

Since its launch last June, NASA's Fermi Gamma-ray Space Telescope has discovered a new class of pulsars, probed gamma-ray bursts and watched flaring jets in galaxies billions of light-years away. Today at the American Physical Society meeting in Denver, Colo., Fermi scientists revealed new details about high-energy particles implicated in a nearby cosmic mystery. "Fermi's Large Area Telescope is a state-of-the-art gamma-ray detector, but it's also a terrific tool for investigating the...

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2008-11-24 09:25:34

Milagro Observatory unveils something never before seen from Earth A Los Alamos National Laboratory cosmic-ray observatory has seen for the first time two distinct hot spots that appear to be bombarding Earth with an excess of cosmic rays. The research calls into question nearly a century of understanding about galactic magnetic fields near our solar system. Joining an international team of collaborators, Los Alamos researchers Brenda Dingus, Gus Sinnis, Gary Walker, Petra Hntemeyer and John...

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2008-11-19 13:45:00

An international team of researchers has discovered a puzzling surplus of high-energy electrons bombarding Earth from space. The source of these cosmic rays is unknown, but it must be close to the solar system and it could be made of dark matter. Their results are being reported in the Nov. 20th issue of the journal Nature. "This is a big discovery," says co-author John Wefel of Louisiana State University. "It's the first time we've seen a discrete source of accelerated cosmic rays standing...

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2008-04-01 16:40:00

A new report commissioned by NASA's Exploration Systems Mission Directorate said that cosmic radiation poses cancer and other health risks for years after astronauts return to Earth, and that a lack of understanding of the biological responses to space radiation is the biggest limiting factor to future missions.The report, authored by the National Research Council, one of the independent National Academies of Science that advises the federal government, said that cosmic rays are so dangerous...

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2008-02-13 08:40:00

European scientists have developed the most accurate method yet for predicting the doses of radiation that astronauts will receive aboard the orbiting European laboratory module, Columbus, attached to the ISS this week. The new software package accurately simulates the physics of radiation particles passing through spacecraft walls and human bodies. Such techniques will be essential to use for calculating the radiation doses received by astronauts on future voyages to the Moon and Mars. To...

2008-01-02 10:03:16

The mysterious origins of cosmic rays that slam into the Earth's atmosphere could soon be revealed, thanks to a better ground-based sensor that costs less than balloons or satellites. Cosmic rays are thought to come from either the center of the galaxy or a nearby supernova, and knowing which is true will help astrophysicists paint a more accurate picture of the cosmos. "Cosmic rays are not a spectator phenomenon in the galaxy — they have a role in galactic dynamics," said...

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2007-12-19 07:00:11

GAINESVILLE, Fla. -- Measures to protect astronauts from health risks caused by space radiation will be important during extended missions to the moon or Mars, say researchers in a paper currently online in Experimental Neurology. Using a mouse model designed to reveal even slight changes in brain cell populations, scientists found radiation appeared to target a type of stem cell in an area of the brain believed to be important for learning and mood control. The findings "” from a...

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2007-12-17 12:05:00

With its powerful detectors, Integral has performed the most-sensitive all-sky survey ever, finding expected clumpy areas at large scales in our local universe. Scientists working with ground-based telescopes have found the same local clumps, while looking for sources of cosmic showers. Integral performed the survey in the hard X-ray band of the electromagnetic spectrum. Although it wasn't the first such survey, Integral's strength lies in the fact that it is unbiased towards sources that are...

c5d0b8bc2e475029d4f12daeb3893ccb1
2007-11-12 00:00:00

ARGONNE, Ill. "“ Ultra-high-energy particles from just outside enormous, active black holes in nearby galaxies travel as far as 250 million light years to make it all the way to Earth, an international team of 400 physicists and astronomers from 17 countries reports in the Nov. 9 issue of the journal Science. "This is the dawn of a new type of astronomy, the beginning of ultra-high-energy-charged particle astronomy," said physics professor Katsushi Arisaka, who led the UCLA research...

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2007-03-21 09:30:00

Mechanism explains how the most energetic form of light can be produced in areas dominated by bright, young stars In 2002, when astronomers first detected cosmic gamma rays -- the most energetic form of light known -- coming from the constellation Cygnus they were surprised and perplexed. The region lacked the extreme electromagnetic fields that they thought were required to produce such energetic rays. But now a team of theoretical physicists propose a mechanism that can explain this...


Latest Cosmic rays Reference Libraries

6_c75a47629377d810d1848fd2d1c26e952
2004-10-19 04:45:41

Cosmic Rays -- Cosmic Rays. Cosmic rays are energetic particles that are found in space and filter through our atmosphere. Cosmic rays have interested scientists for many different reasons. They come from all directions in space, and the origination of many of these cosmic rays is unknown. Cosmic rays were originally discovered because of the ionozation they produce in our atmosphere. Cosmic rays also have an extreme energy range of incident particles, which have allowed physicists to...

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