Moon, making it approximately six times wider than the Earth's diameter. Legacy The lunar crater Aristarchus, the minor planet 3999 Aristarchus, and the telescope Aristarchos are named after him. See also Aristarchus's inequality Eratosthenes (), a Greek mathematician who calculated the circumference of the Earth and also the distance from the Earth to the Sun. Hipparchus (), a Greek mathematician who measured the radii of the Sun and the Moon as well as their distances from the Earth. Posidonius (), a Greek astronomer and mathematician who calculated the circumference of the Earth. References Bibliography Further reading External links Biography: JRASC, 75 (1981) 29 First estimate of the Moon's distance and First estimate of the Sun's distance from educational website From Stargazers to Starships Aristarchus of Samos, The Ancient Copernicus (https://archive.org/details/aristarchusofsam00heatuoft Online Galleries, History of Science Collections, University of Oklahoma Libraries High resolution images of works by Aristarchus of Samos in .jpg and .tiff format. 310s BC births 230s BC deaths 3rd-century BC Greek people 3rd-century BC writers Ancient Greek astronomers Ancient Greek mathematicians Ancient Samians 3rd-century BC mathematicians