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Timing Analysis Quiz

  1. Accurate measurements of how a star's apparent brightness changes as a function of time allows



  2. The early calendars were developed based on



  3. Who created a great data bank of observations of the positions of objects in the sky as a function of time?



  4. When a pulsar is moving toward the Earth, its pulse



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
Acting Project Leader: Dr. Barbara Mattson
All material on this site has been created and updated between 1997-2012.

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