The magnetosphere is the region around a planet dominated by its magnetic field. It plays a crucial role in protecting the planet from solar wind and cosmic radiation, which can strip away the atmosphere and harm living organisms. For Earth, the magnetosphere extends thousands of kilometers into space, creating a shield that deflects charged particles from the sun. In addition to protection, the magnetosphere is responsible for phenomena such as the Auroras, which occur when solar particles collide with the atmosphere. Understanding the magnetosphere is essential for studying space weather and its effects on technology and life on Earth.