Geographical sites:

  • Babylon (click here to focus in map) (see also Pleiades #727082)
    Pleiades_icon Babylon settlement, fort Geocontext: Fostat, Cairo
    Description: An ancient fortified city of the Delta of Egypt, located at Babylon in the area today known as Coptic Cairo.
  • Rome (click here to focus in map) (see also Pleiades #423025)
    Pleiades_icon Roma urban, settlement, temple Geocontext: Roma/Rome
    Description: The capital of the Roman Republic and Empire.
  • Greenland (click here to focus in map) (see also GeoNames #3425505)
    Geonames_icon Greenland dependent political entity Description: GL


Text #8750

Editorial comment by Laura Knight-Jadczyk

The comet of August 1471 was accompanied by a redness in the sky, witnessed from Babylon to Rome. The Astronomical Diaries record two of these events in September–October 145 and in July–August 144. This is the only report of such a persistent red sky phenomenon in the nearly continuous record of well-dated astronomical and meteorological events reported at Babylon during the last four centuries BC. The redness was most likely due to cometary dust. A moderate acidity peak in a Greenland ice core crops up at around 149-1472.

  1. Ramsey J.T., A Catalogue of Greco-Roman Comets from 500 BC to AD 400, JHA, 38, 2007, p. 175-197

  2. Stothers R, Cloudy and clear stratospheres before A.D. 1000 inferred from written sources , J. Geophys. Res., 107(D23), 4718, doi:10.1029/2002JD002105, 2002

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