Theoria Motuum Planetarum et Cometarum. Continens Methodum Facilem ex Aliquot Observationibus Orbitas cum Planetarum Tum Cometarum Determinandi. Una cum Calculo, Quo Cometae, Qui Annis 1680. Et. Itemque Ejus, Qui Nuper est Visus, Motus Verus Investigator

1st Edition . Hardcover. Very Good. Illustrated with a frontispiece engraving of a comet by F. H. Fritsch; 4 folding diagrams at rear; plus Ornamental vignettes with fantasy motifs. 4to. Contemporary leather binding, spine with 5 raised bands; gilt-lettered red morocco label and gilt designs. Berolini Sumtibus Ambrosii Haude . . . (Berlini 1744). First Edition. (Brunet: II, col. 1092; Graesse: II, p. 518; Houzeau & Lancaster: Nº 11948; Dic. Biographique et Bibliographique: p. 308.)

Leonardo Euler, the noted Swiss mathematician, physicist, astronomer, and philosopher, was for many years a professor in Berlin at the Court of Frederick the Great. In 1766, at the request of the Empress of Russia, Catherine II, he left Germany and went to Russia, where lived until his death in 1783. His work in astronomy was recognized by a number of Paris Academy Prizes over the course of his career. In this work Euler gives the solutions of the main problems of theoretical astronomy dealing with the structure, nature, motion and action of comets and planets. . . . a complete mathematical treatment of the two-body problem consisting of a planet and the Sun. (Debnath, The Legacy of Leonhard Euler, page 364). His accomplishments include determining with great accuracy the orbits of comets and other celestial bodies, understanding the nature of comets, and calculating the parallax of the sun. His calculations also contributed to the development of accurate longitude tables. Binding slightly scuffed, traces of bugs on the first few pages; some slight foxing; o/w Very Nice. Rare