Void Points, Rosettes, and a Brief History of Planetary Astronomy

Peter Kosso

Research output: Contribution to journalArticlepeer-review


Almost all models of planetary orbits, from Aristotle through Newton, include void points, empty points in space that have an essential role in defining the orbit. By highlighting the role of these void points, as well as the rosette pattern of the orbit that often results, I bring out different features in the history of planetary astronomy and place a different emphasis on its revolutionary changes, different from those rendered in terms of epicycles or the location of the earth.

Original languageEnglish (US)
Pages (from-to)373-390
Number of pages18
JournalPhysics in Perspective
Issue number4
StatePublished - Dec 2013


  • Apollonius
  • Aristotle
  • Eudoxus
  • Georg Peurbach
  • Georg Rheticus
  • Hipparchus
  • Isaac Newton
  • Johannes Kepler
  • Nicolaus Copernicus
  • Ptolemy
  • Tycho Brahe
  • Vitruvius
  • epicycles
  • history of astronomy
  • planetary orbits
  • rosettes
  • void points

ASJC Scopus subject areas

  • History
  • General Physics and Astronomy


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