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Cosmic Ray Clocks
This educational brief provides an overview of the concepts of radioactivity, basic particle physics, and the use of radioactive decay as a mechanism to date our galaxy.
Intended for grade levels:
  • Middle (6-8)
Type of resource:
  • Text:
    • Ref. material
Subject:
  • Physics
  • Space science
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
NASA materials may not be used to state or imply the endorsement by NASA or by any NASA employee of a commercial product, service or activity, or used in any other manner that might mislead. NASA should be acknowledged as the source of its material. It is unlawful to falsely claim copyright or other rights in NASA material. NASA shall in no way be liable for any costs, expenses, claims or demands arising out of use of NASA's cassettes and photographs by a recipient or a recipient's distributees. NASA personnel are not authorized to sign indemnity or hold harmless statements, releases from copyright infringement, or documents granting exclusive use rights.
DLESE Catalog ID: NASA-Edmall-176
Resource contact / Creator / Publisher:
Contributor: Daniel Hortert
National Aeronautics and Space Administration Ambassadors