Babylonian eclipse: Ptolemy, Babylon and the rotation of the Earth

Details Babylonian eclipse: Ptolemy, Babylon and the rotation of the Earth Babylonian eclipse: Ptolemy, Babylon and the rotation of the Earth

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26g....46e..11s&link_type=abstract

Astronomy & Geophysics, Volume 46, Issue , pp. 5.11-5.15.

Physics

Geophysics

Scientific paper

The recent discovery of a Babylonian astronomical text containing a report of the lunar eclipse on 23 December 383 BC confirms that the Greek astronomer Claudius Ptolemy correctly described this eclipse as having been observed in Babylon, in chapter IV of his Almagest. The visibility of this eclipse in Babylon implies that either present estimates of the Earth's rotational clock error are too low by around 600 seconds at that period, or, more likely, the eclipse was observed at a time of unusually high atmospheric refraction.

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