... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Astronomers open window into Europa's ocean . Data suggests there is a chemical exchange between the jovian moonт??s ocean and surface, making the ocean a richer chemical environment. ... Based on new data from the W. M. Keck Observatory about Jupiterт??s moon Europa, astronomers hypothesize that chloride salts bubble up from the icy moonт??s global liquid ocean and reach the frozen surface where they are bombarded with sulfur from volcanoes on Io. ...