Arising from the interaction between planetary bodies with a significant intrinsic magnetic field and the surrounding magnetized plasma, the magnetospheres constitute essential components of the planetary systems. These planetary bodies include either planets embedded into the interplanetary medium, such as Mercury, Earth, Jupiter, Saturn, Uranus, and Neptune, or Ganymede with it magnetosphere nested within Jupiter's one. We invite submissions addressing the various aspects of the magnetospheres, from the configuration to the dynamics, and from the front of the bow shock to the downstream magnetotail. While the basic physical processes at play are the same, the diversity of the interacting environments makes comparative studies particularly relevant to this session. This session will thus be an ideal forum to address the recent advances in our understanding of all these systems. These discussions will be relevant not only for past and current missions, but also for future missions, such as Juno, BepiColombo and JUICE.