[[Image:Europamoon.jpg|right|thumb|Europa, a moon of Jupiter.]]
[[Image:Europamoon.jpg|right|thumb|Europa, a moon of Jupiter.]]
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'''Europa''' is the fourth largest moon of [[Jupiter]]. Discovered by [[Galileo]], it has a diameter of 3,318 km (about 2,068 miles, which would make it slightly smaller than the Earth's [[Moon]]). It is surrounded by a layer of [[ice]], which makes it part of the search for [[extraterrestrial life]].
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'''Europa''' is the fourth largest moon of [[Jupiter]]. Discovered by [[Galileo]], it has a diameter of 3,318 km (about 2,068 miles, which would make it slightly smaller than the Earth's [[Moon]]). It is surrounded by a layer of [[ice]], which makes it part of the search for [[extraterrestrial life]]. There are almost no craters on Europa.
==References==
==References==
John Gribbin, ''Companion to the Cosmos'' (Little, Brown & Company, 1996)
John Gribbin, ''Companion to the Cosmos'' (Little, Brown & Company, 1996)