From Biocrawler, the free encyclopedia.
Photo taken from medieval manuscript by Qotbeddin Shirazi. The image depicts a star constellation.
Qutb al-Din al-Shirazi (1236 - 1311) was a 13th century Persian Astronomer from Shiraz, Iran.
He and his master Nasir al-Din Tusi critiqued the Almagest of Ptolemy.
He also continued the optical studies of Alhazen. It was Qutb al Din who gave a first correct explanation of the formation of the rainbow.
See also
 Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Qutb_al-Din_al-Shirazi (http://en.wikipedia.org/wiki/Qutb_al-Din_al-Shirazi) version history (http://en.wikipedia.org/w/index.php?title=Qutb_al-Din_al-Shirazi&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License)  CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)
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