Paul Wittich

Wittich may have been influenced by Valentin Naboth's book Primarum de coelo et terra[3] in adopting the Capellan system to explain the motion of the inferior planets.

Thus the question of whether the daily parallax of Mars was ever greater than that of the Sun was crucial to whether Wittich's (and indeed also Praetorius's and Ursus's) model was observationally tenable or not.

Having failed to find any Martian parallax greater than the Solar parallax, Tycho had no valid observational evidence for his 1588 conclusion that Mars comes nearer to the Earth than the Sun,[7] and nor did anybody else at that time,[8] whereby Tycho's uniquely distinctive geoheliocentric model had no valid observational support in this respect.

The latter differed from Tycho's only in respect of its non-intersecting Martian and Solar orbits and its daily rotating Earth.

Thus by 1610 it seems the only observationally tenable candidate for a planetary model with solid celestial orbs was Wittich's Capellan system.