A plume of water vapour is seen erupting (7 O'clock) from the surface of Jupiter's moon, Europa - PICTURE: NASAAstronomers on Monday said they have spotted evidence of water vapor plumes rising from Jupiter's moon Europa, a finding that might make it easier to learn whether life exists in the warm, salty ocean hidden beneath its icy surface.The apparent plumes detected by the Hubble Space Telescope shoot about 125 miles (200 km) above Europa's surface before, presumably, raining material back down onto the moon's surface, NASA said.Europa, considered one of the most promising candidates for life in the solar system beyond Earth, boasts a global ocean with twice as much water as in all of Earth's seas hidden under a layer of extremely cold and hard ice of unknown thickness.While drilling through the ice to test ocean water for signs of life would be a daunting task, sampling water from the plumes might be a simpler project."If the plumes are real, it potentially gives us easier acces...

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