Text #8750Editorial 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.