Coronal mass ejections (CMEs) are large expulsions of plasma and magnetic fields from the Sun's corona into space. These events are triggered by intense solar activity, such as solar flares or filament eruptions, and can release enormous amounts of energy and material into the solar system. CMEs can travel at speeds of up to several million miles per hour and can have significant effects on Earth's magnetosphere, ionosphere, and even technological infrastructure such as satellites and power grids. Studying CMEs is important for understanding solar dynamics, space weather, and their potential impacts on Earth and other planets in the solar system.