Aristarchus of samos heliocentric model
Ptolemy.
Aristarchus of samos heliocentric model
Aristarchus of Samos
Greek astronomer and mathematician (c.310 – 230 BC)
Aristarchus of Samos (; Ancient Greek: Ἀρίσταρχος ὁ Σάμιος, Aristarkhos ho Samios; c. 310 – c. 230 BC) was an ancient Greek astronomer and mathematician who presented the first known heliocentric model that placed the Sun at the center of the universe, with the Earth revolving around the Sun once a year and rotating about its axis once a day.
He also supported the theory of Anaxagoras according to which the Sun was just another star.[2]
He likely moved to Alexandria, and he was a student of Strato of Lampsacus, who later became the third head of the Peripatetic School in Greece.
According to Ptolemy, he observed the summer solstice of 280 BC.[3] Along with his contributions to the heliocentric model, as reported by Vitruvius, he created two separate sundials: one that is a flat disc; and one hemispherical.[4]
Aristarchus was influenced by the concept pres