The Telescope against Copernicus: Star Observations by Riccioli Supporting a Geocentric Universe

  title={The Telescope against Copernicus: Star Observations by Riccioli Supporting a Geocentric Universe},
  author={Christopher M. Graney},
  journal={Journal for the History of Astronomy},
  pages={453 - 467}
  • C. Graney
  • Published 1 November 2010
  • Physics
  • Journal for the History of Astronomy
Giovanni Battista Riccioli (1598–1671), in his Almagestum novum of 1651, reports on observations of the telescopic disks of stars made by him and his team. The Almagestum novum features a table of stellar disk diameters (measured telescopically), information on how the data in the table were collected, and conclusions drawn from the data about the distances and physical sizes of stars. Like Tycho Brahe, who had measured stellar disks with the naked eye decades earlier, Riccioli did not know… 

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