[12], 494, [2] pp. Numerous diagrams in the text. Large engraved vignette on title page. (folio) 35.3x22.8 cm (13¾x9"), period calf. First Edition.
The present work is notable for a number of reasons, being the first astronomical textbook on gravitational principles, and is important for containing the first publication of Newton's paper "Lunae theoria", the original statement of Newton's lunar theory. The author, David Gregory, was one of Newton's closest friends and associates. Two ink ownership signatures on title-page. Babson 71; Houzeau & Lancaster 9240; Sotheran I, 1652.