Complex sentence: Coronal mass ejections release huge quantities of matter and electromagnetic radiation into space above the sun's surface, either near the corona (sometimes called a solar prominence), or farther into the planet system, or beyond (interplanetary CME).
Split into simpler sentences: Coronal mass ejections release huge quantities of matter and electromagnetic radiation into space above the sun's surface. Either near the corona (sometimes called a solar prominence), or farther into the planet system, or beyond (interplanetary CME).