. "alternative geocentric (or \\\"geo-heliocentric\\\") model" . "geoheliocentric" . "system later proposed" . . "system" . . "his own version" . "geo-heliocentric" . "his model of the Solar System" . . . "geo-heliocentric model" . . . "five solar planets" . "Tychonic system" . "Tychonic system" . "Tychonic" .