Resources
You can find additional resources via the links below.
NASA Resources
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Information about Cepheid Variables (stars that brighten and dim periodically)
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Introduction to Cataclysmic Variables (CVs)
Information about cataclysmic variables (binary star systems that have a white dwarf and a normal star companion)
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Information about light curves (graphs that show the brightness of an object over a period of time)
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General Catalog of Variable Stars (GCVS), March 2017 Version
A reference source on all known variable stars
ESA Resources
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ESA Science & Technology – Variable stars in Hubble’s sky
Animation showing a patch of sky with variable stars, as observed by NASA’s Hubble Space Telescope
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Information about and data from the European Space Agency’s Gaia mission
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Excerpt from Gaia Early Data Release 3 Documentation, 2.2.4 Variability
Information on variability from the European Space Agency’s Gaia mission