Solar activity: How it evolves with time

Understanding solar activity is relevant because the physical phenomena that cause it cannot be studied on Earth, and also because it allows us to predict space weather. Solar storms (coronal mass ejections) carry large amounts of charged particles that form auroras and can also damage satellites and, if they are very intense, even power grids. The Sun began to be studied in 1609 when Galileo Galilei invented the telescope (he studied it by projecting it onto a white surface, since looking direc…