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How Does the Universe Generate Gamma-Rays?

There are several different ways, or physical processes, that happen in the Universe (as well as, of course, on Earth!) which produce gamma-rays. These include:
  1. a high-energy particle can collide with another particle,
  2. a particle can collide and annihilate with its anti-particle,
  3. an element can undergo radioactive decay, or
  4. a charged particle can be accelerated.

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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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Project Leader: Dr. Barbara Mattson
Curator: Meredith Gibb
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This page last updated: Wednesday, 20-Aug-2008 15:57:37 EDT