Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A coronal mass ejection is a massive burst of solar wind and magnetic fields rising above the solar corona or being released into space. Originating from active regions on Sun's surface, such as groupings of sunspots associated with frequent flares, coronal mass ejections release huge quantities of matter and electromagnetic radiation into space above the sun's surface, either near the corona or farther into the planet system or beyond. The ejected material is a plasma consisting primarily of electrons and protons, but may contain small quantities of heavier elements such as helium, oxygen, and even iron. Learn more about coronal mass ejections, their causes and effects as well as their impacts on earth in this book.