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comet
Space
March 12, 2018
Violent collision could have made comet in just hours
Space
May 8, 2017
Why comets have oxygen atmospheres
Earth Sciences
October 13, 2016
Signs of comet collision found in 55-million-year-old rocks
Space
August 4, 2016
Watch a comet's death dive into the sun
Space
March 21, 2016
'Twin' comets will brush past Earth this week
Space
August 24, 2015
What Rosetta found on Comet 67P
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