Plate Tectonics on Europa

    Besides its icy surface crisscrossed with innumerable crack lines, Europa, one of the four biggest moons of Jupiter, intrigued planetologists for decades

    Philae Silence Dashes Hopes

    Optimism evaporates as host comet nears Sun...The optimistic expectations, triggered by a message on June 13 from the long-dormant lander Philae which

    Pluto Mysteries Deepen

    New images point to complicated geologyA new set  of images released by NASA after its New Horizons spacecraft which made a flyby