Rumours of an impending calamitous collision of a comet with the Earth have been discounted by the use of ancient Chinese records to refine the orbit of the prograde comet Swift-Tuttle.
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Maddox, J. Comfort for next century but one. Nature 367, 681 (1994). https://doi.org/10.1038/367681a0
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DOI: https://doi.org/10.1038/367681a0