About 400 years ago, Galileo Galilei discovered 4 satellites orbiting around Jupiter using a telescope that he invented. The discovery of Galileo satellites: Io, Europa, Ganymede, Calisto lead to the important paradigm change from "Ptolemaic (geocentric) theory" to "Copernican (heliocentric) theory".
JUICE (Jupiter Icy Moons Explorer) is ESA's L-class mission that will investigate the formation mechanisms of the Jupiter system and the necessary conditions for habitability.
Jupiter is the largest planet in our solar system and it holds the key to understand how our solar system was made. By investigating Galileo satellites that keep the record where and how Jupiter was made, we will be able to obtain the clues to understand how our solar system and exoplanet system recently discovered one after another were made.
JUICE will be a Ganymede orbiter at the final stage of the mission. Ganymede is the largest satellite in our solar system and it is the only satellite that has intrinsic global magnetic field just like Earth. Recent study has revealed the possibility that Ganymede and Europa possess liquid ocean inside. There may exist habitable environment in the ocean floor of Ganymede and Europa that is similar to the hydrothermal vent in the Earth's deep ocean floor.
|Name||JUICE (Jupiter Icy Moons Explorer)|