The Venus Tablet of Ammisaduqa
Twenty-one years of recorded first and last sightings of Venus argue that celestial regularity, not just omen interpretation, was worth tracking for its own sake, laying the observational groundwork later systematized in Enuma Anu Enlil.
- earliest systematic planetary observation record
- omens paired with celestial events
- the unresolved 'Venus tablet dating problem' for Mesopotamian chronology
- survival only through later Assyrian library copies
A record of the heliacal risings and settings of Venus over roughly twenty-one years during the reign of Ammisaduqa, fourth king after Hammurabi, preserved not in an Old Babylonian original but in later Neo-Assyrian copies from Ashurbanipal's library, each observation paired with an omen it was thought to portend. Because Venus's cycle is astronomically precise and reconstructible, the tablet has become the central, contested anchor for absolute Mesopotamian chronology, different reconstructions of which specific year the observations began shift every earlier Mesopotamian date by as much as a century or more, a genuine unresolved problem rather than a settled fact.
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