Space plasma physics is the academic discipline dedicated to investigating the physical properties, dynamics, and interactions of ionized gases (plasmas) within extraterrestrial environments, encompassing phenomena from the solar atmosphere and solar wind to planetary magnetospheres, ionospheres, and the interstellar medium. This field focuses on the collective behavior of charged particles and their complex coupling with electric and magnetic fields, which is fundamental to understanding space weather, astrophysical processes, and the evolution of cosmic structures.