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Cosmic Rays

The very highest energy cosmic rays are so rare that a one square kilometer area on the Earth gets hit by them less than one time per century! You need a really big detector to measure very many of these events!

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Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

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Acting Project Leader: Dr. Barbara Mattson
Project Leader (on leave): Dr. Jim Lochner
Curator: Meredith Gibb
Responsible NASA Official: Phil Newman
All material on this site has been created and updated between 1997-2012.
Last Updated: Wednesday, 15-Sep-2004 11:44:24 EDT

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