Tychonic system
（重定向自Geoheliocentrism）
![In this depiction of the Tychonic system, the objects on blue orbits (the moon and the sun) rotate around the earth. The objects on orange orbits (Mercury, Venus, Mars, Jupiter, and Saturn) rotate around the sun. Around all is a sphere of stars, which rotates.](/Images/godic/202501/15/Tychonian_system.svg1607.png")
![Tychonic system](/Images/godic/202501/15/Tychonian1607.png")
The Tychonic system (or Tychonian system) is a model of the Solar system published by Tycho Brahe in the late 16th century which combines what he saw as the mathematical benefits of the Copernican system with the philosophical and "physical" benefits of the Ptolemaic system. The model may have been inspired by Valentin Naboth and Paul Wittich, a Silesian mathematician and astronomer. A similar yet mathematically more efficient geoheliocentric model was also proposed a century earlierby Nilakantha Somayaji of the Kerala school of astronomy and mathematics.