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Cepheid Variable in Spiral Galaxy

A Cepheid is a star that varies in light intensity over regular, measurable periods. The period of pulsation is directly related to a Cepheid's intrinsic brightness making observations of these stars a powerful tool for determining distance. This animation shows a Cepheid variable star varying in brightness in the arm of a spiral galaxy.
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This animation shows a Cepheid variable star varying in brightness in the arm of a spiral galaxy.    This animation shows a Cepheid variable star varying in brightness in the arm of a spiral galaxy.
Duration: 30.0 seconds
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Short URL to This Page:http://svs.gsfc.nasa.gov/goto?10145
Animation Number:10145
Completed:2004-12-01
Animator:Dana Berry (Skyworks Digital) (Lead)
Writer:Michael McClare (HTSI)
Series:Astrophysics Visualizations
 Astrophysics Animations
Goddard TV Tape:G2007-007HD
Please give credit for this item to:
NASA
 
Keywords:
SVS >> Galaxy
SVS >> HDTV
SVS >> Astrophysics
NASA Science >> Universe
 
 


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Many of our multimedia items use the GCMD keywords. These keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0

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