Caves seen on the surface of a comet for the first time

    Caves on comet 67P/Churyumov-Gerasimenko

    The caves on comet 67P/Churyumov-Gerasimenko

    CNES/ESA/Rosetta/MPS/OSIRIS/Philippe Lamy, David Romeuf, Guillaume Faury, Olivier Groussin

    We have spotted caves on a comet for the first time. The caves, identified on comet 67P/Churyumov-Gerasimenko – also known as comet 67P – are full of ice, which could help explain mysterious jets that astronomers have seen coming from the comet.

    While we know roughly what comets are made of – commonly rock, ice and frozen gases – we don’t know much about their internal structure. Caves could offer an easy access point for scientists to learn about this interior, but unlike many planets and bodies in…

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