Diodorus of Alexandria

Diodorus of Alexandria or Diodorus Alexandrinus was a gnomonicist, astronomer [1] and a pupil of Posidonius.[2][3][4]

Writings

He wrote the first discourse on the principles of the sundial, known as Analemma.[5] a commentary on this having later been written by Pappus of Alexandria,[6] that is no longer extant.[7] A small number of sentences having survived the centuries and attributed to him are known; these comment on:the differences (for the purpose of defining) between astronomy and natural science (physiologia [8]) the word meanings for cosmos and star, the nature of (the things being) stars and Γαλαξίαςor [9] [Galaxias [10] kuklos,[11][12][13] (those things which are altogether stars are called today the Milky Way)]. He was known to Eudoros. In his dealings with astronomy he was known to Marinus in his commentary on Euclid's Data containing quotes of Diodorus's opinions on the meaning of a term.[14]

gollark: If we had an even number of people there might be ties.
gollark: Fear it, although it isn't technically from that.
gollark: This application is LITERALLY a particle of weight W placed on a rough plane inclined at an angle of θ to the horizontal. The coefficient of friction between the particle and the plane is μ. A horizontal force X acting on the particle is just sufficient to prevent the particle from sliding down the plane; when a horizontal force kX acts on the particle, the particle is about to slide up the plane. Both horizontal forces act in the vertical plane containing the line of greatest slope.
gollark: Fiiiiine.
gollark: I agree. It's precisely [NUMBER OF AVAILABLE CPU THREADS] parallelized.

See also

References
  1. Diodorus of Alexandria." Complete Dictionary of Scientific Biography. 2008. Encyclopedia.com. 4 Dec. 2011 <http://www.encyclopedia.com>. [Retrieved 2011-09-15]
  2. Aristarchus of Samos and Sir Thomas Little Heath ...the ancient Copernicus; a history of Greek astronomy to Aristarchus, together with Aristarchus's Treatise on the sizes and distances of the sun and moon: a new Greek text with translation and notes (1913) archive.org [Retrieved 2011-09-15]
  3. John Antonakos amazon.com website page 92 of Noted Greeks of Antiquity [Retrieved 2011-09-15] ISBN 1-4033-2565-0
  4. thefreedictionary.com
  5. encyclopedia.com retrieved 15/09/2011
  6. Thomas Heath (1981). A History of Greek Mathematics: From Aristarchus to Diophantus. Courier Corporation. p. 287. ISBN 978-0-486-24074-9.
  7. Heike Sefrin-Weis (2010). Pappus of Alexandria: Book 4 of the Collection: Edited With Translation and Commentary by Heike Sefrin-Weis. Springer Science & Business Media. p. 15. ISBN 978-1-84996-005-2.
  8. © 2001–2011 Douglas Harper etymonline.com Retrieved 2011-09-15
  9. Kosmas Milt Markatos (2010) hellenes-markatos.gr website (referencing definition of greek) Retrieved 2011-09-15
  10. oxforddictionaries.com Retrieved 2011-09-15
  11. kalos-software.com Archived 2011-08-04 at the Wayback Machine Retrieved 2011-09-15
  12. pritchardschool.com website Retrieved 2011-09-15
  13. Prof. Richard Pogge kuklos reference Retrieved 2011-09-15
  14. O. Neugebauer (2004). A History of Ancient Mathematical Astronomy. Volume 2. Springer Science & Business Media. p. 840. ISBN 978-3-540-06995-9.
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