Tag: Water

  • Rosetta raises questions on how water got to Earth

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    A four-image mosaic of comet 67P/Churyumov-Gerasimenko using images taken by Rosetta’s navigation camera on Dec. 7 at a distance of 19.7 kilometers (12.2 miles) from the center of the comet. Credit: ESA/Rosetta/NAVCAM New readings from the European Space Agency’s Rosetta mission have challenged the theory that comets brought water to Earth in a series of…

  • Rover data suggest Mars crater once contained long-lived lake

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    This illustration depicts a lake of water partially filling Mars’ Gale Crater, receiving runoff from snow melting on the crater’s northern rim. Credit: NASA/JPL-Caltech/ESA/DLR/FU Berlin/MSSS Scientists analyzing imagery from NASA’s Curiosity Mars rover believe sediments left by an ancient lake more than three billion years ago formed a towering mountain that is set to be…