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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



Home Imagine Science Special Exhibit Satellites and Data
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Ask an Astrophysicist

Imagine the Universe is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Francis Marshall (Acting Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

The Imagine Team
Project Leader: Dr. Jim Lochner
Curator:Meredith Gibb
Responsible NASA Official:Phil Newman
All material on this site has been created and updated between 1997-2008.
Last Updated: Wednesday, 15-Sep-2004 11:44:23 EDT

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