In this activity, students learn to recognize periodicity within a set of data by using the examples of pendulums and binary star systems. Included are prerequisites, enrichment activities, materials lists, datasets, instructions, and links to additional information..

No specific technical requirements, just a browser required

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.

Publisher: National Aeronautics and Space Administration
Goddard Space Flight Center
http://www.nasa.gov/centers/goddard/home/index.html