Medieval Chronicles and the Rotation of the Earth
The main purpose of this work is to obtain and assess a large body of observations of solar eclipses from medieval records (roughly the period from 400 to 1200), and to use the observations in improving our knowledge of the motion of the solar system. Catalogues of various types of data are given in the appendices including but not limited to lunar eclipses, comets, novae, famines, and earthquakes.
BACKGROUND AND PURPOSES OF THE WORK
THE EASTER PROBLEM
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3rd hour 4th feria 6th hour accelerations Anglo-Saxon Chronicle annalist astronomical Bede Bede's Byzantine calculations calendar calends called Cedrenus century Chapter Christian Chronicon chronological comet compiled Constantinople contemporaneous copied correct cycle Diceto discussion Domitiani Latini Easter tables ecclesiastical moon eclipse records edition by G.H. editor Einhard entry epact equinox error Fasti Vindobonenses Fuldenses G.H. Pertz Gervase Ginzel give Gregory of Tours Hahn's Hannover Hence Herimannus Hydatius identified Latin Laurissenses lipse lists lunar eclipse magnitude Marcellinus Marianus Scotus Matthew Paris Mellicenses monastery month Monumenta Germaniae Historica Nisan novae Oppolzer original Pertz in Monumenta Quedlinburgenses Ralph of Coggeshall records of solar Reliability Rerum Roman says Scriptores Section seems seen set of annals Sigebertus solar eclipses Solar Eclipses Found Standard deviation Theophanes tion Ulster umbral William of Malmesbury Worcester writing