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Cosmic Rays Quiz

  1. Cosmic rays are made up of:

  2. Most galactic cosmic rays have been accelerated in:

  3. Cosmic rays are accelerated by:

  4. The percentage of cosmic rays that are either hydrogen or helium is:

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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.

The Imagine Team
Project Leader: Dr. Barbara Mattson
Curator: Meredith Gibb
Responsible NASA Official: Phil Newman
All material on this site has been created and updated between 1997-2014.
This page last updated: Wednesday, 15-Sep-2004 11:44:23 EDT