# Mathematician:Aristarchus of Samos

## Mathematician

Greek astronomer and mathematician who used parallax to determine the relative distances of the moon and the sun.

His result was inaccurate, based as it was on faulty input data, but the method was sound.

One of the first to suggest a heliocentric universe.

## Nationality

Greek

## History

- Born: 310 BCE, Greece
- Died: 230 BCE, Greece

## Inventions

- Apparently invented a sundial in the shape of a hemispherical bowl.

## Writings

- c. 260 BCE:
*Περὶ μεγεθῶν καὶ ἀποστημάτων ἡλίου καὶ σελήνης*(On the Sizes and Distances of the Sun and Moon)

## Sources

- John J. O'Connor and Edmund F. Robertson: "Aristarchus of Samos": MacTutor History of Mathematics archive

- 1992: George F. Simmons:
*Calculus Gems*... (previous) ... (next): Chapter $\text {A}.5$: Archimedes (ca. $287$ – $212$ B.C.) - 2008: Ian Stewart:
*Taming the Infinite*... (previous) ... (next): Chapter $5$: Eternal Triangles - 2014: Christopher Clapham and James Nicholson:
*The Concise Oxford Dictionary of Mathematics*(5th ed.) ... (previous) ... (next): Entry:**Aristarchus of Samos**(about 270 bc)