Heraclides Ponticus (Ancient Greek: Ἡρακλείδης ὁ Ποντικός Herakleides; c. 390 BC – c. 310 BC) was a Greek philosopher and astronomer who was born in Heraclea Pontica, now Karadeniz Ereğli, Turkey, and migrated to Athens. He is best remembered for proposing that the Earth rotates on its axis, from west to east, once every 24 hours. He is also hailed as the originator of the heliocentric theory, although this is disputed.
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👉 Heraclides Ponticus in the context of Hicetas
Hicetas (Ancient Greek: Ἱκέτας or Ἱκέτης; c. 400 – c. 335 BC) was a Greek philosopher of the Pythagorean School. He was born in Syracuse, Magna Graecia. 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. When Copernicus referred to Nicetus Syracusanus (Nicetus of Syracuse) in De revolutionibus orbium coelestium as having been cited by Cicero as an ancient who also argued that the Earth moved, it is believed that he was actually referring to Hicetas.
Cicero refers to Hicetas in the Academica, volume II, citing in turn Theophrastus. According to Heath:
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Heraclides Ponticus in the context of Hermippus of Smyrna
Hermippus of Smyrna (Greek: Ἕρμιππος ὁ Σμυρναῖος) was a Greek grammarian and peripatetic philosopher, surnamed by the ancient writers the Callimachian (Greek: ό Καλλιμάχειος), from which it may be inferred that he was a disciple of Callimachus about the middle of the 3rd century BC, while the fact of his having written about the life of Chrysippus proves that he lived to about the end of the century. His writings seem to have been of very great importance and value. They are repeatedly referred to by the ancient writers, under many titles, of which, however, most, if not all, seem to have been chapters of his great biographical work, which is often quoted under the title of Lives (Bioi). The work contained the biographies of a great many ancient figures, including orators, poets, historians, and philosophers. It contained the earliest known biography of Aristotle, as well as philosophers such as Pythagoras, Empedocles, Heraclitus, Democritus, Zeno, Socrates, Plato, Antisthenes, Diogenes, Stilpo, Epicurus, Theophrastus, Heraclides, Demetrius Phalereus, and Chrysippus. The work has been lost, but many later Lives extensively quote it.
Josephus and Origen cite Hermippus to argue that Pythagoras owed a debt to Judaism.