Comet Mania
Simon Schaffer, 19 February 1981
“... and, occasionally, terror. Halley’s comet appears on the Bayeux Tapestry as a harbinger of King Harold’s doom. It was probably first spotted by the ever-watchful Chinese. In 840 AD an imperial edict in China forbade astronomers to mix ‘with civil servants and common people in general’ lest their knowledge of these terrible objects incite popular ... ”