Jupiter's Inner Moons . ... Credit Copyright: The Galileo Project , NASA Explanation: The potato-shaped inner moons of Jupiter are lined-up in this mosaic "family portrait" of these tiny Jovian satellites. ... All these moons orbit in the zone between Io and Jupiter's rings , are bombarded by high-energy ions within the Jovian magnetosphere , and are probably locked in synchronous rotation by Jupiter's strong gravity. ... NASA Web Site Statements, Warnings, and Disclaimers . ...