Articles on the history of ancient astronomy

Published Articles:

• The Very Early History of Trigonometry, DIO: the International Journal of Scientific History, 17 (2011) 34-42. The article is also available at www.dioi.org.
• An Early Use of the Chain Rule, DIO: the International Journal of Scientific History, 17 (2011) 43-50. The article is also available at www.dioi.org.
• Greek Angles from Babylonian Numbers, Archive for History of Exact Sciences, 64 (2010) 375-394. The article is also available at www.springerlink.com.
• Mean Motions in Ptolemy’s Planetary Hypotheses, Archive for History of Exact Sciences, 63 (2009) 633-654. The article is also available at www.springerlink.com.
• A Year Length Hidden in Ancient Planetary Mean Motions, Journal for the History of Astronomy, 40, (2009) 213-218.
• Four Lost Episodes in Ancient Solar Theory, Journal for the History of Astronomy, 39, (2008) 283-296.
• Statistical Dating of the Phenomena of Eudoxus, DIO, 15, (2008) 7-23. The article is also available at www.dioi.org.
• An Interesting Property of the Equant, DIO, 15, (2008) 24-37. The article is also available at www.dioi.org.
• Mean Motions and Longitudes in Indian Astronomy, Archive for History of Exact Sciences, 62 (2008) 489-509. The article is also available at www.springerlink.com.
• The Second Lunar Anomaly in Ancient Indian Astronomy, Archive for History of Exact Sciences, 61 (2007) 147-157. The article is also available at www.springerlink.com.
• Ancient Declinations and Precession, DIO: the International Journal of Scientific History, 13.3 (2006). The article is also available at www.dioi.org.
• Analysis of the Farnese Globe, Journal for the History of Astronomy 37 (2006) 87-100.
• Ptolemy’s Planetary Mean Motions Revisited, co-authored with Alexander Jones, Centaurus, 47 (2005) 226-235.
• The equant in India: the mathematical basis of Indian planetary models, Archive for History of Exact Sciences, 59 (2005) 563-576. The article is also available at www.springerlink.com.
• Hipparchus’ Eclipse Trios and Early Trigonometry, Centaurus, 47 (2005) 163-177.
• Comment on the Origin of the Equant papers by Evans, Swerdlow, and Jones, Journal for the History of Astronomy 36 (2005) 1-6.
• Ptolemy’s Treatment of the Outer Planets, Archive for History of Exact Sciences, 59 (2005) 169-187. The original publication is available at www.springerlink.com.
• Computer Animations of Greek and Arabic Planetary Models, Journal for the History of Astronomy 35, 225-228 (2004).
• The Depth of Association Between the Ancient Star Catalogues, Journal for the History of Astronomy 34, 227-230 (2003).
• Letter to Isis, Isis, 93 (2002) 649.
• On the Clarity of Visibility Tests, DIO: the International Journal of Scientific History, 12 (2002). The article is also available at www.dioi.org.
• The Measurement Method of the Almagest Stars, DIO: the International Journal of Scientific History,12 (2002). The article is also available at www.dioi.org.
• Ancient Solutions of Venus & Mercury Orbits, DIO: the International Journal of Scientific History,11.3 (2002). The article is also available at www.dioi.org.
• Associations Between the Ancient Star Catalogues, Archive for History of Exact Sciences, 56 (2002) 435-450. The original publication is available at www.springerlink.com.
• Hipparchus’ Coordinate System, Archive for History of Exact Sciences, 56 (2002) 427-433. The original publication is available at www.springerlink.com.
• "Dating the Almagest Star Catalogue Using Proper Motions: A Reconsideration," Journal for the History of Astronomy, 33, 45-55, (2002).

Conference Talks:

Early Mathematical Astronomy: Stories from the Lost Years, Neugebauer Conference 2010 (November 13, 2010) 

Mean Motions and Longitudes in Indian Astronomy , NDVIII slides (presentation version), (July 23, 2007).

The History of the Second Lunar Anomaly , NDVIII slides (presentation version), (July 27, 2007).

Who Knew What, and When? The Timing of Discoveries in Early Greek Astronomy, NDVII talk (written version), (July 9, 2005).

Who Knew What, and When? The Timing of Discoveries in Early Greek Astronomy, NDVII slides (presentation version), (July 9, 2005).

Indian Planetary Theories and Greek Astronomy, NDVII Thursday workshop (presentation version), (July 7, 2005).

New Results on Ancient Star Catalogs, Notre Dame Workshop talk, (June 22, 2003).

The Zodiacal Armillary Sphere, Notre Dame Workshop talk, (June 21, 2003).

Discussion of the Farnese Globe