A study of Jupiter's moon Europa indicates that the icy surface may not be as thick as once believed, possibly offering scientists easier access to the ocean trapped beneath it. Using Hawaii's Keck II Telescope, scientists detected a spectroscopic signal caused by a magnesium-based substance that wouldn't have been possible without contact with the ocean below. "We now have evidence that Europa's ocean is not isolated. ... That means that energy might be going into the ocean, which is important in terms of the possibilities for life there," said Mike Brown, lead author of the study.
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