WASHINGTON - As club sandwiches go, this undoubtedly is the biggest one in the solar system.
Scientists said on Friday that Jupiter's moon Ganymede may possess ice and liquid oceans stacked up in several layers much like the popular multilayered sandwich. They added that this arrangement may raise the chances that this distant icy world harbors life.
NASA's Galileo spacecraft flew by Ganymede in the 1990s and confirmed the presence of an interior ocean, also finding evidence for salty water perhaps from the salt known as magnesium sulfate.
Ganymede, which with its diameter of about 3,300 miles (5,300 km), is the largest moon in the solar system and is bigger than the planet Mercury.
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