Cosmic Rays

High-energy particles that fly through the universe at close to the speed of light. Cosmic rays are mostly bare protons and electrons. Some probably are blasted into space from exploding stars, while others may come from the disks of material that encircle the supermassive black holes in the centers of galaxies.

Radio Programs

Muons Zapped by a supernova Monday, April 29, 2013
Balloon Ride Taking a balloon ride for science Saturday, April 7, 2012
Cosmic Nobel Discovering a mysterious cosmic energy Sunday, December 11, 2011
Interstellar Skies Looking for clear interstellar skies Tuesday, November 15, 2011
Luis Alvarez Subatomic particles and dead dinosaurs Monday, June 13, 2011
Dangerous Space One of the hazards of space travel Thursday, December 16, 2010
Quiet Sun The Sun stays unusually calm Saturday, August 21, 2010
IceCube, Part IV
IceCube, Part III
IceCube, Part II
Fermi
Particle Accelerators Black holes play hardball Wednesday, February 6, 2008

Featured Images

Victor Hess prepares to ascend in a balloon to study cosmic rays, 1912
 Radiation Hunter Saturday, April 7, 2012
Alpha Magnetic Spectrometer-2 attached to the International Space Station
 On Duty Monday, May 23, 2011
Space shutle Endeavour launches on its final mission, June 16, 2011
 Final Endeavour Monday, May 16, 2011

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