Like his fellow Pythagorean Ecphantus and the Academic Heraclides Ponticus, he believed that the daily movement of permanent stars was caused by the rotation of the Earth around its axis.
Seperti rekan Pythagorasnya, Akphantos dan Akademik Heraklides Pontikos, ia percaya bahwa pergerakan bintang sehari-hari disebabkan oleh rotasi Bumi di sekitar porosnya.