Seleucus Of Seleucia
Seleucus (or Seleukos) of Seleucia (born c. 190 BC, fl. 150s BC) was a Hellenistic astronomer and philosopher. Coming from Seleucia on the Tigris, the capital of the Seleucid empire, or, alternatively, Seleukia on the Erythraean Sea, he is best known as a proponent of heliocentrism and for his theory of the origin of tides.
Read more about Seleucus Of Seleucia: Heliocentric Theory, Tides, Seleucus in Strabo