Ancient Greek astronomers

Theodosius of Bithynia (Greek: Θεοδόσιος; c. 160 BC – c. 100 BC) was a Greek astronomer and mathematician who wrote the Sphaerics, a book on the geometry of the sphere.

Bion of Abdera (Greek: Βίων ὁ Ἀβδηρίτης) was a Greek mathematician of Abdera, Thrace, and a pupil of Democritus.

Andronicus of Cyrrhus or Andronicus Cyrrhestes (Greek: Ἀνδρόνικος Κυρρήστου, Andrónikos Kyrrhēstou), son of Hermias, was a Macedonian astronomer who flourished about 100 BC.

Aratus (/əˈreɪtəs/; Ancient Greek: Ἄρᾱτος ὁ Σολεύς; ca. 315 BC/310 BC – 240 BC) was a Greek didactic poet.

Posidonius (Greek: Ποσειδώνιος, Poseidonios, meaning "of Poseidon") "of Apameia" (ὁ Ἀπαμεύς) or "of Rhodes" (ὁ Ῥόδιος) (c. 135 BCE – c. 51 BCE), was a Greek Stoic philosopher, politician, astronomer, geographer, historian and teacher native to Apamea, Syria.

Theon of Smyrna (Greek: Θέων ὁ Σμυρναῖος; fl. 100 CE) was a Greek philosopher and mathematician, whose works were strongly influenced by the Pythagorean school of thought.

Pytheas of Massalia (Ancient Greek: Πυθέας ὁ Μασσαλιώτης; Latin: Pytheas Massiliensis; fl. 4th century BC), was a Greek geographer and explorer from the Greek colony of Massalia (modern-day Marseille).

Oenopides of Chios (Greek: Οἰνοπίδης) was an ancient Greek mathematician (geometer) and astronomer, who lived around 450 BCE.

Menelaus of Alexandria (/ˌmɛnɪˈleɪəs/; Greek: Μενέλαος, Menelaos; c. 70 – 140 CE) was a Greek mathematician and astronomer, the first to recognize geodesics on a curved surface as natural analogs of straight lines.

Achilles Tatius (Greek: Ἀχιλλεὺς Τάτιος) of Alexandria was a Roman era Greek writer whose fame is attached to his only surviving work, the ancient Greek novel or romance The Adventures of Leucippe and Clitophon.

Philip (or Philippus) of Opus (Greek: Φίλιππος Ὀπούντιος), was a philosopher and a member of the Academy during Plato's lifetime.

Ecphantus or Ecphantos (Ancient Greek: Ἔκφαντος) is a shadowy Greek pre-Socratic philosopher.

Hicetas (Ancient Greek: Ἱκέτας or Ἱκέτης; c. 400 – c. 335 BC) was a Greek philosopher of the Pythagorean School.

Harpalus was an ancient Greek astronomer (flor. 82nd Olympiad, ca.450 BC) who corrected the cycle of Cleostratus and invented the Nine Year Cycle.

Democritus (/dɪˈmɒkrɪtəs/; Greek: Δημόκριτος, Dēmókritos, meaning "chosen of the people"; c. 460 – c. 370 BC) was an influential Ancient Greek pre-Socratic philosopher primarily remembered today for his formulation of an atomic theory of the universe.

Thales of Miletus (/ˈθeɪliːz/; Greek: Θαλῆς (ὁ Μῑλήσιος), Thalēs; c. 624 – c. 546 BC) was a pre-Socratic Greek philosopher, mathematician and astronomer from Miletus in Asia Minor, current day Milet in Turkey and one of the Seven Sages of Greece.

Anaximander (/əˌnæksᵻˈmændər/; Greek: Ἀναξίμανδρος Anaximandros; c. 610 – c. 546 BC) was a pre-Socratic Greek philosopher who lived in Miletus, a city of Ionia (in modern-day Turkey).