Template:Selected anniversaries/February 18: Difference between revisions

From Gnomon Chronicles
Jump to navigation Jump to search
No edit summary
No edit summary
Line 1: Line 1:
<gallery>
<gallery>
|| ** DONE: Pat's Blog **
|| ** DONE: Pat's Blog **
|| *** PAREIDOLIA: Arab thinkers


||3102 B.C. The Kaliyuga begins according to the Indian mathematician Aryabhata (born A.D. 476). He believed all astronomical phenomena were periodic, with period 4,320,000= 20 × 603 years, and that all the planets had mean longitude zero on this date. [College Mathematics Journal, 16 (1985), p. 169.] *VFR https://pballew.blogspot.com/2019/02/on-this-day-in-math-february-18.html
||3102 B.C. The Kaliyuga begins according to the Indian mathematician Aryabhata (born A.D. 476). He believed all astronomical phenomena were periodic, with period 4,320,000= 20 × 603 years, and that all the planets had mean longitude zero on this date. [College Mathematics Journal, 16 (1985), p. 169.] *VFR https://pballew.blogspot.com/2019/02/on-this-day-in-math-february-18.html
Line 6: Line 7:
File:Thābit's Arabic translation of Apollonius' Conics.jpg|link=Thābit ibn Qurra (nonfiction)|901: Physician, astronomer, and mathematician [[Thābit ibn Qurra (nonfiction)|Thābit ibn Qurra]] dies. He made important discoveries in algebra, geometry, and astronomy; in astronomy, Thabit was one of the first reformers of the Ptolemaic system.
File:Thābit's Arabic translation of Apollonius' Conics.jpg|link=Thābit ibn Qurra (nonfiction)|901: Physician, astronomer, and mathematician [[Thābit ibn Qurra (nonfiction)|Thābit ibn Qurra]] dies. He made important discoveries in algebra, geometry, and astronomy; in astronomy, Thabit was one of the first reformers of the Ptolemaic system.


||1201: Nasir al-Din al-Tusi born ... scientist and writer. Pic: postage stamp.
File:Nasir_al-Din_al-Tusi_at_observatory.jpg|link=Nasir al-Din al-Tusi (nonfiction)|1201: Polymath [[Nasir al-Din al-Tusi (nonfiction)|Nasir al-Din al-Tusi]] born. Tusi will be a mathematician, architect, philosopher, physician, scientist, and theologian; he will establish trigonometry as a mathematical discipline in its own right.  


||1535: Heinrich Cornelius Agrippa dies ... magician, astrologer, and theologian. Pic.
||1535: Heinrich Cornelius Agrippa dies ... magician, astrologer, and theologian. Pic.

Revision as of 06:29, 24 February 2020