Cosmic ray
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Cosmic rays are energetic particles, originating in outer space. They may produce secondary particles that penetrate the Earth's atmosphere and surface. The term ray is historical as cosmic rays were thought to be electromagnetic radiation. Most primary cosmic rays (those that enter the atmosphere from deep space) are composed of familiar stable subatomic particles that normally occur on Earth, such as protons, atomic nuclei, or electrons. However, a very small fraction are stable particles of antimatter, such as positrons or antiprotons, and the precise nature of this remaining fraction is an area of active research.
- Related: Environmental radioactivity, Cosmic ray spallation, Forbush decrease, Gilbert Jerome Perlow, Ultra-high-energy cosmic ray, Galactic cosmic ray, Extragalactic cosmic ray, Solar energetic particle
| Aspera European network portal Aspera European network portal www.ASPERA-EU.org - Web |
| Animation about cosmic rays on astroparticle.org Animation about cosmic rays on astroparticle.org astroparticle.aspera-eu.org/.../index.php?option=com_content&task=view&id=111&Itemid=107 - Web |
| Helmholtz Alliance for Astroparticle Physics Helmholtz Alliance for Astroparticle Physics www.hap-astroparticle.org - Web |
Gallery for «Cosmic ray»
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| Particle Data Group review of Cosmic Rays Particle Data Group review of Cosmic Rays pdg.lbl.gov/2008/reviews/cosmicrayrpp.pdf - Web |
| Introduction to Cosmic Ray Showers Introduction to Cosmic Ray Showers www.mpi-hd.mpg.de/hfm/CosmicRay/Showers.html - Web |
| BBC news, Cosmic rays find uranium, 2003 BBC news, Cosmic rays find uranium, 2003 news.bbc.co.uk/1/hi/sci/tech/2868041.stm - Web |
| BBC news, Rays to nab nuclear smugglers, 2005 BBC news, Rays to nab nuclear smugglers, 2005 news.bbc.co.uk/1/hi/sci/tech/4282657.stm - Web |
| BBC news, Physicists probe ancient pyramid (using ... BBC news, Physicists probe ancient pyramid (using cosmic rays), 2004 news.bbc.co.uk/1/hi/sci/tech/3710735.stm - Web |
| Shielding Space Travelers Shielding Space Travelers www.scientificamerican.com/.../article.cfm?id=shielding-space-travelers - Web |
| Anomalous cosmic ray hydrogen spectra from Voyager... Anomalous cosmic ray hydrogen spectra from Voyager 1 and 2 imagine.gsfc.nasa.gov/.../anomalous.html - Web |
| Anomalous Cosmic Rays Anomalous Cosmic Rays helios.gsfc.nasa.gov/acr.html - Web |
Low relevance
| Review of Cosmic Rays Review of Cosmic Rays www.int.washington.edu/PHYS554/winter_2004/chapter8_04.pdf - Web |
| Composition of Solar cosmic rays Composition of Solar cosmic rays dphs10.saclay.cea.fr/.../compact11_gb.php - Web |
| "Who's Afraid of a Solar Flare? Solar activity can... "Who's Afraid of a Solar Flare? Solar activity can be surprisingly good for astronauts." science.nasa.gov/headlines/y2005/07oct_afraid.htm?list84849 - Web |
| History of Cosmic Rays History of Cosmic Rays www.telescopearray.org/outreach.html - Web |
| Amateur Muon Detector – schematics and articles Amateur Muon Detector – schematics and articles www.cosmicrays.org - Web |
| video of Muon detector in use at Smithsonian Air a... video of Muon detector in use at Smithsonian Air and Space Museum www.youtube.com/watch?v=xJtSWdT598k - Web |
