Diodorus of Alexandria

Diodorus of Alexandria or Diodorus Alexandrinus ^[1] was a gnomonicist,^[2][3] astronomer ^[4] and a pupil of Posidonius.^[5]

Writings

He wrote the first discourse on the principles of the sundial, known as Analemma.^[6]

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),^[7] the word meanings for cosmos and star, the nature of (the things being) stars and Γαλαξίαςor^[8] [Galaxias ^[9] kuklos,^[10][11][12](those things which are altogether stars are called today the Milky Way)].^[13]

Those who knew of him

He was known to Eudoros.^[14]

In his dealings with astronomy he was known to Marinus, his commentary on Euclid's Data containing quotes of Diodorus's opinions on the meaning of a term.^[15]

See also

• Alexandria
• Analemma
• Euclid

References

1. ^ Noted Greeks of Antiquity; John Antonakos Retrieved 15/09/2011
2. ^ definitions a
3. ^ definitions b
4. ^ encylopediac retrieved 15/09/2011
5. ^ Aristarchus of Samos, 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) Retrieved 15/09/2011
6. ^ encyclopedia.com retrieved 15/09/2011
7. ^ etymology retrieved 15/09/2011
8. ^ greek definition retrieved 15/09/2011
9. ^ Oxford retrieved 15/09/2011
10. ^ greek dictionary retrieved 15/09/2011
11. ^ pritchard school retrieved 15/09/2011
12. ^ kuklos reference Prof. Richard Pogge Retrieved 15/09/2011
13. ^ A history of ancient mathematical astronomy, Volume 2; by Otto Neugebauer retrieved 15/09/2011
14. ^ Otto Neugebauer
15. ^ Otto Neugebauer

External links

• encyclopedia.com article

Persondata
Name	Diodorus Of Alexandria
Alternative names	Diodorus Alexandrinus
Short description	Scientist
Date of birth
Place of birth
Date of death
Place of death