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This is comet 67P/Churyumov–Gerasimenko's nucleus, imaged by Rosetta on 3 July 2016 with its OSIRIS camera. That bright, white plume is a jet blasting from the nucleus—helping form the comet's tails as it nears the Sun. Credit: ESA/Rosetta/MPS for OSIRIS Team/MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA