Halley's Comet
Today marks the first day that Halley's Comet was reliably recorded in history... in 240 BCE. It wasn't, of course, called that - or even so identified until Halley worked out its periodicity, but nonetheless a notation recorded in the Chinese chronicle Records of the Grand Historian, or Shiji, of a comet that appeared in the east is certainly this comet. (It might have been mentioned in even older Chinese records, but this is the earliest certain mention.)
0 Comments:
Subscribe to Post Comments [Atom]