[Geology2] Halley's comet 'was spotted by the ancient Greeks'

Halley's comet 'was spotted by the ancient Greeks'
BBC, 10 September 2010

A celestial event seen by the ancient Greeks may be the earliest
sighting of Halley's comet, new evidence suggests. According to ancient
writers, a large meteorite smacked into northern Greece between 466BC
and 467BC. The writers also described a comet in the sky at the time the
meteorite fell to Earth, but this detail has received little attention,
say the researchers. Comet Halley would have been visible for about 80
days in 466BC, researchers write in the Journal of Cosmology. New
Scientist magazine reports that, until now, the earliest probable
sighting of the comet was an orbit in 240BC, an event recorded by
Chinese astronomers.

http://www.bbc.co.uk/news/science-environment-11255168

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