The assembly of magnetospheres, satellites, rings, small bodies, dust, gas and plasma tori that co-orbit the Giant Planets of our Solar System form with their central planet fascinating worlds offered to the exploration of our space probes, in which the incredible diversity of dynamical phenomena which characterize planetary systems in general can be observed and analyzed in situ. The lessons we learn from their exploration can be extrapolated to provide us with a better understanding of the Solar System as a whole, and also of the more than 500 planetary systems that have already been discovered around stars other than the Sun.

　　Two months after the end of in-orbit operations of the NASA-ESA Cassini-Huygens mission to the Saturn System, we can already recognize that this outstanding mission has left us with a unique scientific understanding of the “Lord of the Rings”. This legacy is going to play an important role in preparing for the next target of the exploration of giant planets: Jupiter and its Planetary System.

　　The missions that are now operating at Jupiter (JUNO) or which are already planned to go to Jupiter in the next decade (JUICE of ESA and Europa Clipper of NASA), have been designed to answer some of the key questions about it: how was it formed, how does it work, does it host habitable worlds? I will describe how these ambitious space exploration missions will address some of these major questions, with a special emphasis on our plans to identify and characterize the “ocean moons”, Europa and Enceladus, as potential habitats for life.

　　Finally, I will introduce the audience to the major challenge of Jupiter and Saturn exploration, the search for possible life inside their “ocean moons”, and to the existing plans for meeting this challenge.

　　For the interested audience, I will additionally do a short presentation of my Institute, the International Space Science Institute in Beijing (ISSI-Beijing) and of the services we are offering to the international community of Space Sciences (with astronomy as the first of these sciences) to fulfill our overarching GOAL:

　　ADVANCE SPACE SCIENCE RESEARCH BY WORLDWIDE COLLABORATION.

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