cosmic rays


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cosmic rays

pl n
(Astronomy) radiation consisting of particles, esp protons, of very high energy that reach the earth from outer space. Also called: cosmic radiation
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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If cosmic rays collide with particles on their way to Earth or stray from their original travel path, he writes, "then there can be no accurate census of the kind Sam Ting is looking for.
The solar wind is less turbulent during solar minima and thus presents less of a barrier to incoming galactic cosmic rays, so cosmic rays were at a high during that time period.
This discovery is a major step toward understanding the origin of cosmic rays, one of Fermi's primary mission goals.
IT MAY BE THE CLOSEST we'll ever get to touching a black hole: catching superenergetic cosmic rays that the hole and its surroundings have accelerated to fantastic velocities.
A new study has conclusively confirmed that the highest-energy cosmic rays that hit Earth from time to time do not come from within the Milky Way.
The Alpha Magnetic Spectrometer is the latest and most ambitious attempt to uncover the identity of dark matter by looking at cosmic rays, which are charged subatomic particles cruising through space.
The result is the most precise measurement to date of the ratio of positrons to electrons in cosmic rays.
Mario Nicola Mazziotta and Francesco Loparco, both at Italy's National Institute of Nuclear Physics in Bari, have been analyzing the Moon's gamma-ray glow as a way of better understanding another type of radiation from space: fast-moving particles called cosmic rays.
Cosmic rays are in fact quite common in space, with astronauts regularly reporting sightings of the light phenomenon. "When a cosmic ray happens to pass through the retina, it causes the rods and cones to fire, and you perceive a flash of light that is really not there," astronaut Don Pettit said on his blog a few years ago. 
Cosmic rays are a flow of nuclei of chemical elements--hydrogen (~ 90%), helium (~ 8%), and the nuclei of the heavier elements (~ 2%).