Latest Cosmic ray Stories

2011-07-18 05:45:00

The radioactive decay of uranium, thorium, and potassium contained in the Earth's crust provides nearly half of the planet's internal heat, claim the authors of a new study that has been published in Nature Geoscience and currently available at the journal's website. "The Earth has cooled since its formation, yet the decay of radiogenic isotopes...in the planet's interior provides a continuing heat source," the international team of American, Japanese, and Dutch researchers behind the project...

2011-06-09 13:45:00

NASA said on Thursday that its Voyager spacecraft has helped to show that the edge of our solar system may not be smooth, but filled with a turbulent sea of magnetic bubbles. Scientists found the sun's distant magnetic field is made up of bubbles about 100 million miles wide.  NASA said the bubbles are created when magnetic field lines reorganize, and the new model suggests the field lines are broken up into self-contained structures disconnected from the solar magnetic field. The...

2011-06-07 09:09:25

NASA will host a media teleconference at 1 p.m. EDT on Thursday, June 9, to discuss a new computer model that shows the edge of our solar system is not smooth, but filled with a turbulent sea of magnetic bubbles. Based on Voyager data, the finding suggests we need to revise our picture of this previously unexplored region so critical for understanding how cosmic rays are created and reach near-Earth space. Galactic cosmic rays are of concern for human space travel, in particular during the...

2011-05-19 09:05:00

After successfully docking with the International Space Station, the Endeavour and station crews wasted no time getting down to business installing a $2 billion cosmic ray detector with the goal of scanning the invisible universe for years to come. Mission Specialists Andrew Feustel and Roberto Vittori used the space shuttle's robotic arm to extract the Alpha Magnetic Spectrometer-2 (AMS) from Endeavour's payload bay and placed it onto the framework on the starboard side of the station....

2011-05-04 08:54:16

MESSENGER carries a Gamma-Ray Spectrometer (GRS) that is capable of measuring and characterizing gamma-ray emissions from the surface of Mercury. Just like radio waves, visible light, and X-rays, gamma rays are a form of electromagnetic radiation, but with higher energies than those other types of radiation. Gamma rays coming from Mercury carry information about the concentrations of elements present on its surface, so observations from the MESSENGER GRS are being used to determine the...

2011-04-25 13:50:45

Time-of-flight detector designed at Rice's Bonner Lab critical to antihelium observation Physicists at Rice University and their collaborators have detected the antimatter partner of the helium nucleus, antihelium-4. This newly observed particle is the heaviest antimatter particle ever detected. Scientists at Rice's Bonner Lab designed and built the new time-of-flight detector that identified antihelium-4. The $7.5 million detector was built by a U.S.-China collaboration led by Rice, with...

2011-04-07 14:40:00

Astronauts anticipate more trips to the moon and manned missions to Mars. But exposure to cosmic radiation outside the Earth's magnetic field could be detrimental to their arteries, according to a study by University of Alabama at Birmingham researchers published April 6, 2011, online in the journal Radiation Research. Using an animal model, researchers assessed the affect of iron ion radiation commonly found in outer space to see if exposures promoted the development of atherosclerosis, as...

2011-04-01 01:02:22

In a paper to be published in the April 10, 2011, issue of The Astrophysical Journal, scientists on NASA's Interstellar Boundary Explorer (IBEX) mission, including lead author Nathan Schwadron and others from the University of New Hampshire, isolate and resolve the mysterious "ribbon" of energy and particles the spacecraft discovered in the heliosphere "“ the huge bubble that surrounds our solar system and protects us from galactic cosmic rays. The finding, which overturns 40 years of...

2011-03-24 13:10:00

Pattern of X-ray 'stripes' in supernova remnant could explain how cosmic rays are produced The discovery of a pattern of X-ray "stripes" in the remains of an exploded star may provide the first direct evidence that a cosmic event can accelerate particles to energies a hundred times higher than achieved by the most powerful particle accelerator on Earth. This result comes from a very long observation of the Tycho supernova remnant with NASA's Chandra X-ray Observatory. It could explain how...

2010-12-22 06:30:00

NASA and the National Science Foundation launched a scientific balloon on Monday, Dec. 20, to study the effects of cosmic rays on Earth. It was the first of five scientific balloons scheduled to launch from Antarctica in December. The Cosmic Ray Energetics And Mass (CREAM VI) experiment was designed and built at the University of Maryland. CREAM VI is investigating high-energy cosmic-ray particles that originated from distant supernovae explosions in the Milky Way and reached Earth.Currently,...

Latest Cosmic ray Reference Libraries

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...

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...

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