CaltechAUTHORS: Book Chapter
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A Caltech Library Repository Feedhttp://www.rssboard.org/rss-specificationpython-feedgenenWed, 26 Jun 2024 13:24:31 -0700Ptolemy's Theories of the Latitude of the Planets in the Almagest, Handy Tables, and Planetary Hypotheses
https://resolver.caltech.edu/CaltechAUTHORS:20200203-145510428
Year: 2005
DOI: 10.1007/1-4020-3048-7_3
The theory of planetary latitude in Book 13 of the Almagest is known, if at all, for its complexity. This has the pleasant result that there is only a small literature on it and that literature is on a high level of technical competence. The same, by the way, is true of latitude theory in general. There are recent expositions by Pedersen and Neugebauer, earlier ones by Delambre and Herz, and a few briefer treatments.
Paradoxically, the complexity of Ptolemy's theory is both its strength and its weakness, its strength because he reached it by doing everything right, at least in principle, its weakness because it is ultimately wrong, as was later recognized by Ptolemy himself, who went on to remedy its deficiencies. It is, as we may say, wrong for the right reasons. And since being wrong for the right reasons is more or less the subject of this collection – for is not most interesting older science wrong for the right reasons? – Ptolemy's latitude theory seems quite appropriate. Our object here is to explain the latitude theory, first its original form in the Almagest, then its later modifications in the Handy Tables and Planetary Hypotheses, each of which shows improvements, and to investigate its observational foundation, for it is the observations that are the cause of both its strength and its weakness. It is unusual to find any revisions in the work of an ancient scientist, but in the case of Ptolemy's latitude theory three distinct stages are known, which may be unique, showing that he himself knew something was wrong and twice set out to correct it.https://resolver.caltech.edu/CaltechAUTHORS:20200203-145510428Tycho, Longomontanus, and Kepler on Ptolemy's Solar Observations and Theory, Precession of the Equinoxes, and Obliquity of the Ecliptic
https://resolver.caltech.edu/CaltechAUTHORS:20101216-074820156
Year: 2010
DOI: 10.1007/978-90-481-2788-7
No abstract.https://resolver.caltech.edu/CaltechAUTHORS:20101216-074820156[Introduction to] Ptolemy in Perspective : Use and Criticism of his Work from Antiquity to the Nineteenth Century
https://resolver.caltech.edu/CaltechAUTHORS:20101214-134835604
Year: 2010
DOI: 10.1007/978-90-481-2788-7
No abstract.https://resolver.caltech.edu/CaltechAUTHORS:20101214-134835604Urania Propitia, Tabulae Rudophinae faciles redditae a Maria Cunitia Beneficent Urania, the Adaptation of the Rudolphine Tables by Maria Cunitz
https://resolver.caltech.edu/CaltechAUTHORS:20200203-141028459
Year: 2011
DOI: 10.1007/978-94-007-2627-7_7
Maria Cunitz's Beneficent Urania, published in 1650, has the distinction of being the earliest surviving scientific work by a woman on the highest technical level of its age, for its purpose was to provide solutions to difficulties in the most advanced science of the age, the mathematical astronomy of Kepler's Rudolphine Tables. Her work is at once original and the product of a long history. In 1577 Tycho Brahe began his program of observations while constructing the Castle of Uraniborg on the island of Hven in the Danish Sound, granted him by King Frederick II, with the object of a complete reform of astronomy, to produce new and accurate tables of the motions of the sun, moon, and planets, which he had envisioned years earlier. The observations, by Tycho and his many assistants, with the finest and largest new instruments, exceeding all previous observations in quality and quantity, many, many thousands, continued through twenty years on Hven, two years of travel through Germany, and, after Tycho entered the service of Rudolph II in 1599, at Prague and the estate of Benatky granted him by the Emperor.https://resolver.caltech.edu/CaltechAUTHORS:20200203-141028459