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Halley's Comet Was Spotted By Ancient Greeks

Halley's Comet and Others May Be Stolen Goods
The detailed tail photograph of Halley's Comet was obtained by Jet Propulsion Laboratory astronomer Eleanor Helin with the 48-inch Schmidt telescope at Caltech's Palomar Observatory on Dec. 13, 1985.
(Image: © NASA/JPL-Caltech)

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