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Imagine the Universe!
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You're close! Just a little off. It may be that you have made an arithmetic error, or perhaps you were off in your estimate of the parallax shift of HT Cas. You may find it easier to print out the page and make measurements from the printout. Try remeasuring the apparent shift of HT Cas, and recalculating the distance!!

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Home Imagine Science Special Exhibit Satellites and Data
Dictionary Resources Teachers' Corner Ask a High Energy Astronomer

Imagine the Universe is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Nicholas White (Director), within the Laboratory for High Energy Astrophysics at NASA's Goddard Space Flight Center.

The Imagine Team
Project Leader: Dr. Jim Lochner
All material on this site has been created and updated between 1997-2004.

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