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The earliest known solar eclipse record redated

Naturevolume 338pages238240 (1989) | Download Citation



AN astronomical event recorded on a clay tablet found in 1948 among the ruins of the ancient city of Ugarit, in what is now Syria, was identified 20 years ago as a description of a total solar eclipse that occurred on 3 May 1375 BC1,2. The dating of ancient solar eclipses provides reference points to fix the long-term evolution of angular momentum in the Earth-Moon system3. We have reanalysed the Ugarit eclipse record4. A new historical dating of the tablet, and mention in the text of the visibility of the planet Mars during the eclipse as well as the month in which it occurred enables us to show that the recorded eclipse in fact occurred on 5 March 1223 BC. This new date implies that the secular deceleration of the Earth's rotation has changed very little during the past 3,000 years.

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  1. 1

    Stephenson, F. R. Nature 228, 651–652 (1970).

  2. 2

    Sawyer, J. F. A. & Stephenson, F. R. Bull. School Oriental African Studies 33, 467–489 (1970).

  3. 3

    Maddox, J. Nature 313, 733 (1985).

  4. 4

    De Jong, T. & van Soldt, W. H. Jber “Ex Oriente Lux” (in the press).

  5. 5

    Virolleaud, Ch. Syria 28, 25–27 (1951).

  6. 6

    Van Soldt, W. H. thesis, Univ. of Leiden (1986).

  7. 7

    Dietrich, M., Lorentz, O. & Sammartin, J. Ugarit Forsch. 6, 464–465 (1974).

  8. 8

    De Moor, G. AOAT 16, 245 (1971).

  9. 9

    Kudleck, M. & Mickler, E. H. Solar and Lunar Eclipses of the Ancient Near East from 3000 BC-0 with Maps, (Butzon & Bercker Kevelaer, Neukirchen, 1971).

  10. 10

    Van Flandern, T. C. & Pulkkinen, K. F. Astrophys. J. Suppl. Ser. 41, 391–411 (1979).

  11. 11

    Explanatory Supplement to the Astronomical Ephemeris H. M. Stationery Office, London (1961).

  12. 12

    Tuckerman, B. Planetary, Lunar and Solar positions 601BC–AD1 (Am. phil. Soc., Philadelphia, 1962).

  13. 13

    Muller, P. M. & Stephenson, F. R. in Growth Rhythms and the History of the Earth's Rotation (eds Rosenberg, G. D. & Runcorn, S. K.) 459–533 (Wiley, London, 1975).

  14. 14

    Allen, C. W. Astrophysical Quantities (Athlone, London, 1973).

  15. 15

    Hoffleit, D. Yale Catalogue of Bright Stars, 3rd revised ed (Yale Univ. Press, New Haven, 1964).

  16. 16

    Parker, R. A. The Calendars of Ancient Egypt (Univ. of Chicago Press, 1950).

  17. 17

    De Vaux, R. Les Institutions de l' Ancient Testament Vol. 1, 271 (Les Editions du Cerf, Paris, 1958).

  18. 18

    Rainey, A. F. Bibl. Archeol. 28, 109 (1965).

  19. 19

    Neugebauer, O. The Exact Sciences in Antiquity (Brown Univ. Press, Providence, 1957).

  20. 20

    Meeus, J., Grosjean, C. C. & van der Leen, W. Canon of Solar Eclipses (Pergamon, Oxford, 1966).

  21. 21

    Dickey, J. O., Williams, J. G. & Yoder, C. P. in IAU Colloq. 63, (ed. Calame, O) 209–216 (Reidel, Dordrecht, 1982).

  22. 22

    Krasinsky, G. A., Saramonova, E. Y., Sveshnikov, M. L. & Shvesnikova, E. S. Astr. Astrophys. 145, 90–96 (1985).

  23. 23

    Wahr, J. Sky and Telescope 545–549 (1986).

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  1. Sterrenkundig Instituut 'Anton Pannekoek', University of Amsterdam, Roetersstraat 15, 1018 WB, Amsterdam, The Netherlands

    • T. de Jong
  2. Assyriologisch Instituut, Leiden University, Postbus 9515, 2300 RA, Leiden, The Netherlands

    • W. H. van Soldt


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