Historiacoelestis -- Yahoo group moderated by Stuart Williams, F.R.A.S. Visit

Astronomical References in the Ruba'iyât of Omar Khayyam -- Excerpts & commentary with reproductions of some of Elihu Vedder's illustrations. Visit

Understanding Tidal Friction -- Article by Peter Brosche on gaining understanding of changes in the Moon's orbit. Visit

Gene Smith's Brief History of Astronomy -- Covers the development of this ancient science from days of Stonehenge (3100 BC) to the discovery of Pulsars (1968 AD). Includes related resource links. Visit

Astronomy in Japan -- Historical & modern Japanese astronomy, & its place in Japanese culture Visit

The Cosmic Microwave Background Radiation -- Robert Woodrow Wilson Nobel Lecture. Visit

Biennial History of Astronomy Conferences -- Workshops at Notre Dame, papers presented, abstracts, group pictures of attendees. Visit

Islamic Astronomy -- Article by Owen Gingerich explores refinement & criticism of Ptolemaic astronomy, including religious influences on direction, & describes precursors to & influences on Copernicus. Visit

The Babylonian Theory of the Planets -- A substantial look at the subject, and a review of N. M. Swerdlow's book. Visit

The Àryabhatíya of Àryabhata -- The oldest exact astronomic constant? The ratio of earth rotations to lunar orbits in Aryabhata's AD 498 writing. Visit

Starry Messenger -- Phase I of the Electronic History of Astronomy, developed in the Whipple Museum of the History of Science at Trinity College, Cambridge. Covers the history of instruments & techniques, themes such as astrology & calendar reform, & biographies of major historical astronomers. Visit

The Manchester Astronomical Society History -- The first hundred years, list of presidents, list of archived documents. Visit

Jewish Astronomy, From Ancient to Modern Times -- Astronomy in Israel from Og's Circle to the Wise Observatory. Visit

Hindu Cosmological Time Cycles -- An accurate calendar & the progenitor of the sexagesimal (base 60) 'degree, minutes, seconds' measurement system. Visit

Astronomy -- Features history of discoveries & references. Visit

Rundetaarn (The Round Tower) -- Astronomy in Denmark: Brahe, Roemer, Hertzsprung. Visit

The Star of Bethlehem -- An investigation of the science & history which bear on the mysterious star said to have accompanied the advent of Christ. Visit

Electronic Newsletter for the History of Astronomy -- Complete archive & subscription information. Visit