Windows to the Universe

This drawing shows the possible interiors of the Galilean moons. (Courtesy of JPL)

NASA

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This drawing shows the possible interiors of the Galilean moons. (Courtesy of JPL) NASA

This drawing shows the possible interiors of the Galilean moons. (Courtesy of JPL) NASA

This drawing shows the possible interiors of the Galilean moons. (Courtesy of JPL) NASA

This drawing shows the possible interiors of the Galilean moons. (Courtesy of JPL)

NASA

This drawing shows the possible interiors of the Galilean moons. (Courtesy of JPL)

NASA

This drawing shows the possible interiors of the Galilean moons. (Courtesy of JPL)

NASA