happy sailing
squiggle
Oct
1st
Thu
2009
permalink
Astrolabe and Equatorium, southern France or Italy, late 15th century. The three prominent discs reflect the ‘epicycles’ used by Ptolemy.(proofmathisbeautiful:Museum of the History of Science)

Astrolabe and Equatorium, southern France or Italy, late 15th century. The three prominent discs reflect the ‘epicycles’ used by Ptolemy.
(proofmathisbeautiful:Museum of the History of Science)