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A volvelle from a sixteenth-century edition of Sacrobosco's De Sphaera. De sphaera mundi (Latin title meaning On the Sphere of the World, sometimes rendered The Sphere of the Cosmos; the Latin title is also given as Tractatus de sphaera, Textus de sphaera, or simply De sphaera) is a medieval introduction to the basic elements of astronomy written by Johannes de Sacrobosco (John of Holywood) c ...
Book three discusses the signs of the zodiac, which are depicted in this 16th-century manuscript. Books two and three deal mainly with the finer details of the zodiac. [38] Book two opens with a preface in which Manilius presents a brief history of hexameter poetry, singling out Homer and Hesiod. The purpose, Volk argues, is to emphasize the ...
Book III covers the length of the year, and the motion of the Sun. Ptolemy explains Hipparchus' discovery of the precession of the equinoxes and begins explaining the theory of epicycles. Books IV and V cover the motion of the Moon, lunar parallax, the motion of the lunar apogee, and the sizes and distances of the Sun and Moon relative to the ...
Book III describes his work on the precession of the equinoxes and treats the apparent movements of the Sun and related phenomena. Book IV is a similar description of the Moon and its orbital movements. Book V explains how to calculate the positions of the wandering stars based on the heliocentric model and gives tables for the five planets.
It is a group of technical books, except for the first one, which is a description of the contents of the other treatises. The books are: Libro de la ochava espera, "Book of the eighth sphere" Libro del alcora; Libro del astrolabio redondo, "Book of the round astrolabe" Libro del astrolabio llano, "Book of the flat astrolabe"
Two pages from the Ratdolt edition of the De astronomia showing woodcuts of the constellations Cassiopeia and Andromeda.Courtesy of the US Naval Observatory Library. De astronomia (Latin: [deː äs̠t̪rɔˈnɔmiä]; Concerning Astronomy) [nb 1] is a book of stories written in Latin, probably during the reign of Augustus (c. 27 BC – AD 14).
Newton's diagram 'to find the force of the Sun to perturb the Moon' accompanying Book 3, Proposition 25 of the Principia. Shown here is Newton's diagram from the first (1687) Latin edition of the Principia (Book 3, Proposition 25, p. 434). Here he introduced his analysis of perturbing accelerations on the Moon in the Sun-Earth-Moon system.
Astronomia nova (English: New Astronomy, full title in original Latin: Astronomia Nova ΑΙΤΙΟΛΟΓΗΤΟΣ seu physica coelestis, tradita commentariis de motibus stellae Martis ex observationibus G.V. Tychonis Brahe) [1] [2] is a book, published in 1609, that contains the results of the astronomer Johannes Kepler's ten-year-long investigation of the motion of Mars.