Changes

== Europa ==

== Europa ==

[[Image:Europa true color.jpg|150px|left]]: ''Main article: [[Europa]]''

[[Image:Europa true color.jpg|150px|left]]: ''Main article: [[Europa (moon)|Europa]]''

'''Europa''', the second innermost, is also the smallest of the Galileans. It has very few craters, and thus by [[uniformitarianism|uniformitarian]] criteria it is considered "young." The brittle ice sheet that overlays it has fueled speculation as to whether a much thicker ice sheet, or a liquid-water ocean, lies deep to it. This in turn has fueled speculation, both in the scientific community and in [[science fiction]], as to whether Europa harbors life.

'''Europa''', the second innermost, is also the smallest of the Galileans. It has very few craters, and thus by [[uniformitarianism|uniformitarian]] criteria it is considered "young." The brittle ice sheet that overlays it has fueled speculation as to whether a much thicker ice sheet, or a liquid-water ocean, lies deep to it. This in turn has fueled speculation, both in the scientific community and in [[science fiction]], as to whether Europa harbors life.