This monograph investigates the astronomical theories and mathematical contributions of Aristarchus of Samos, the ancient Greek scientist who first proposed a heliocentric model of the universe. Sir Thomas Heath, a renowned classical scholar and mathematician, utilizes his expertise in Greek geometry to reconstruct the logical framework of Aristarchus's work. By analyzing the surviving fragments and the accounts of later commentators, Heath argues that Aristarchus's heliocentric hypothesis was a rigorous scientific deduction rather than a mere philosophical speculation. The text provides a comprehensive examination of the mathematical methods employed by the ancients to calculate the relative sizes and distances of the sun and moon.

Experts consider this work a foundational text for understanding the development of ancient Greek astronomy and the history of mathematics. Readers frequently note the academic density of the prose, which assumes a high level of familiarity with classical geometry and astronomical terminology.