Giovanni Domenico Cassini

Giovanni Domenico CassiniAlso known as

  • Giandomenico Cassini
  • Jean-Dominique Cassini


Catholic astronomer, mathematician and engineer. He determined the period of rotation of Jupiter, Venus, and Mars, researched lunar librations and the zodiacal light, advanced a theory of cometary motion, discovered four Saturnian satellites, suggested oval paths in place of the ellipses of Kepler which were named Cassinians in his honor, and was first director of the Paris Observatory.



MLA Citation

  • “Giovanni Domenico Cassini”. New Catholic Dictionary. CatholicSaints.Info. 30 August 2018. Web. 22 September 2020. <>