Variable Stars Stars Astronomy

Variable Stars

Variable Stars are stars that change brightness. Their brightness can change from just a fraction (not even noticeable to the naked eye) up to 20 magnitudes. To get an idea of how much a magnitudes is, consider that the difference between brightest star one can see outside at night (in a fairly dark area) and the dimmest is about 6 magnitude. Over 300,000 variable stars are known and have been cataloged.

• - The largest organization for variable stars: provides professional and amateur collaboration, research, and analysis of variable star observations.
  
• - A study on the nature of the speed of light in space using light curves and spectroscopic observations of variable stars as evidence.
  
• - Observing variable stars.
  
• - An article by Alan MacRobert from Sky and Telescope Magazine about the star Algol (Beta Persei) was the first eclipsing variable star ever discovered.
  
• - ASSA's variable star group. News, FAQ, charts, and software.
  
• - Currently contains 311 stars which have been classified as Delta Scutis or Gamma Doradus in some published source.
  
• - The IBVS is a bulletin of Commissions 27 and 42 of the International Astronomical Union, published by Konkoly Observatory, Budapest, Hungary.
  
• - By Jim Smith's. Purpose is to provide a zero cost, interactive 3D virtual reality system.
  
• - Collaborative Project aimed at getting new people involved in variable star observing.
  
• - Research group working on the GCVS, Sternberg Astronomical Institute, Moscow, Russia. Includes catalogs and publications.
  
• - An article by John Isles from Sky and Telescope Magazine.
  
• - A critical review of the Cepheid distance scale, from its inception, to the Hipparcos mission and beyond.
  
  

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