From Discovery News:
Piecing together historic record and correlating it with the location of celestial objects nearly 2,500 years ago is an an epic task, but it can prove rather useful for interpreting ancient cosmic discoveries.
After some fascinating astronomical detective work, researchers have (possibly) found the first documented proof of a sighting of Halley's Comet two centuries earlier than when Chinese astronomers first described the famous 'dirty snowball' around 240 BC.
So, who beat the Chinese? The Greeks.
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