You can find additional resources via the links below.

NASA Resources

• Cepheid Variables

  Information about Cepheid Variables (stars that brighten and dim periodically)

• Introduction to Cataclysmic Variables (CVs)

  Information about cataclysmic variables (binary star systems that have a white dwarf and a normal star companion)

• Introduction to Light Curves

  Information about light curves (graphs that show the brightness of an object over a period of time)

• General Catalog of Variable Stars (GCVS), March 2017 Version

  A reference source on all known variable stars

• TESS Software Tools – TESS Science Support Center

ESA Resources

• 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

• Gaia Data Release 3 Overview

  Information about and data from the European Space Agency’s Gaia mission

• Excerpt from Gaia Early Data Release 3 Documentation, 2.2.4 Variability

  Information on variability from the European Space Agency’s Gaia mission