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When was Halley’s Comet first sighted after Edmond Halley predicted its return?
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Edmond Halley
Edmond Halley, detail of an oil painting by Richard Phillips, c. 1720; in the National Portrait Gallery, London.
Edmond Halley predicted that the comet he studied would return in 1758. Although he did not live to see his prediction fulfilled, the comet was sighted late in 1758, confirming his calculations.1