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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).
The Toledan Tables were updated in the 1270s by the Alfonsine tables, which were produced at Toledo, in Spanish and Latin, from the original tables of two centuries earlier. [8] The descendants of the Toledan Tables, as updated with some corrections, were the most widely used astronomy tables in late medieval Latin astronomy.
Before the manuscript was rebound, probably in London, in the early seventeenth century, little is known about its history. It appeared in the Plas Power, Denbighshire library catalogue that was compiled in 1816 but may have already been there for some time, possibly in the possession of Thomas Lloyd (c. 1673-1734), the lexicographer who spent ...
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 ...
The Alfonsine Tables (Spanish: Tablas Alfonsíes, Latin: Tabulae Alphonsinae), sometimes spelled Alphonsine Tables, provided data for computing the position of the Sun, Moon and planets relative to the fixed stars. The tables were named after Alfonso X of Castile, who sponsored their creation.
Latin 7432 (former shelfmarks Colbert 6089) is a medieval astronomical manuscript preserved as a part of the Latin collection in Bibliothèque nationale de France. This is an outstanding example of a presentation manuscript .
[22] [23] [24] According to Manilius, the universe is composed of two spheres: one (the Earth) is solid and the other (the "sphere of stars", often called the firmament) is hollow. The constellations are fixed in the firmament; the Earth is stationary and the firmament revolves around it, explaining the movements of the stars.
He shows that there is a relationship between color and absolute magnitude for 90% of the stars in the Milky Way Galaxy. In 1913, Henry Norris Russell published a diagram that shows this relationship. Although astronomers agree that the diagram shows the sequence in which stars evolve, they argue about which way the sequence progresses.