Before revision: Painting illustrating a flyby of Io by the Galileo spacecraft|alt=A painting of a spacecraft with fully extended, umbrella-like radio antenna dish, in front of an orange planetary body at left with several, blue, umbrella-like clouds, with Jupiter in back ground on the right, with its Great Red Spot visible The exploration of Io, Jupiter's innermost Galilean and third-largest moon, began with its discovery in 1610 and continues today with Earth-based observations and visits by spacecraft to the Jupiter system.
After revision: File:Artwork Galileo-Io-ټځوللص 1 2 3 4 i said disco you say barbie this could be school barbie barbieJupiter.JPG|Painting illustrating a flyby of Io by the Galileo spacecraft|alt=A painting of a spacecraft with fully extended, umbrella-like radio antenna dish, in front of an orange planetary body at left with several, blue, umbrella-like clouds, with Jupiter in back ground on the right, with its Great Red Spot visible The exploration of Io, Jupiter's innermost Galilean and third-largest moon, began with its discovery in 1610 and continues today with Earth-based observations and visits by spacecraft to the Jupiter system.