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Timeline of stellar astronomy

   * 134 BC - Hipparchus creates the magnitude scale of stellar apparent
     luminosities
   * 1596 - David Fabricius notices that Mira's brightness varies
   * 1672 - Geminiano Montanari notices that Algol's brightness varies
   * 1686 - Gottfried Kirch notices that Chi Cygni's brightness varies
   * 1718 - Edmund Halley discovers stellar proper motions by comparing his
     astrometric measurements with those of the Greeks
   * 1782 - John Goodricke notices that the brightness variations of Algol
     are periodic and proposes that it is partially eclipsed by a body
     moving around it
   * 1784 - Edward Piggot discovers the first Cepheid variable star
   * 1838 - Thomas Henderson, Friedrich Struve, and Friedrich Bessel measure
     stellar parallaxes
   * 1844 - Friedrich Bessel explains the wobbling motions of Sirius and
     Procyon by suggesting that these stars have dark companions
   * 1906 - Arthur Eddington begins his statistical study of stellar motions
   * 1908 - Henrietta Leavitt discovers the Cepheid period-luminosity
     relation
   * 1910 - Ejnar Hertzsprung and Henry Russell study the relation between
     magnitudes and spectral types of stars
   * 1924 - Arthur Eddington develops the main sequence mass-luminosity
     relationship
   * 1929 - George Gamow proposes hydrogen fusion as the energy source for
     stars
   * 1938 - Hans Bethe and Carl von Weizsacker detail the proton-proton
     chain and CNO cycle in stars
   * 1939 - Rupert Wildt realizes the importance of the negative hydrogen
     ion for stellar opacity
   * 1952 - Walter Baade distinguishes between Cepheid I and Cepheid II
     variable stars
   * 1953 - Fred Hoyle predicts a carbon-12 resonance to allow stellar
     triple alpha reactions at reasonable stellar interior temperatures
   * 1961 - Chushiro Hayashi publishes his work on the Hayashi track of
     fully convective stars
   * 1963 - Fred Hoyle and William Fowler conceive the idea of supermassive
     stars
   * 1964 - Subrahmanyan Chandrasekhar and Richard Feynman develop a general
     relativistic theory of stellar pulsations and show that supermassive
     stars are subject to a general relativistic instability
   * 1967 - Gerry Neugebauer and Eric Becklin discover the
     Becklin-Neugebauer object at 10 microns
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