This thesis focuses on the very high Mach number shock wave that is located sunward of Saturn's strong magnetic field in the continuous high-speed flow of charged particles from the Sun (the solar wind). The author exploits the fact that the Cassini spacecraft is the only orbiter in a unique parameter regime, far different from the more familiar near-Earth space, to provide in-situ insights into the unreachable exotic regime of supernova remnants. This thesis bridges the gap between shock physics in the Solar System and the physics of ultra-high Mach number shocks around the remnants of supernova explosions, since to date research into the latter has been restricted to theory, remote observations, and simulations. Introduction to Space Plasmas.- The Sun-Saturn Connection.- Spacecraft and Instrumentation.- Magnetic Field Characterisation of Saturn's Bow Shock.- Quasi-perpendicular High Mach Number Collisionless Shocks.- The Magnetic Structure of Saturn's Magnetosheath.- Summary and Perspective.- Bibliography. Dr. Sulaiman graduated from Imperial College London with a Masters in Aeronautical Engineering with first class honors. He holds a Ph.D. in Space Physics at Imperial College London under Professor Michele Dougherty FRS. He is currently a postdoctoral scholar at the University of Iowa.
