Astrolabe is an elaborate inclinometer and can be considered an analog calculator capable of working out several kinds of problems in astronomy Stock Photo - Alamy
An Ancient Greek Astronomical Calculation Machine Reveals New Secrets - Scientific American
Practical Astronomy with your Calculator: Duffett-Smith, Peter: 9780521356992: Amazon.com: Books
A 2,000 Year Old Greek Geared Calculator For Astronomy | Fine Art Conservation Laboratories (FACL, Inc.)
University Linear Icons Set. Structure of Atom, Calculator. Physical Education Lessons, Astronomy Stock Vector - Illustration of knowledge, football: 223082787
An Ancient Greek Astronomical Calculation Machine Reveals New Secrets - Scientific American