Sunspots are a most peculiar phenomena occurring in the solar system. Sunspots are regions of the sun that are darker and (relatively) cooler than the surrounding photosphere. Sunspots are a temporary phenomenon, usually with a lifespan lasting from several hours to several months. Sunspots can be carried around by the internal rotation of a stellar object. Consequently, the amount of sunspots on a sun have a sinusoidal variability (meaning that the amount of sunspots on the spot goes up and down with time) and this causes the sun to be slightly cooler during times of high sunspot activity. Sunspots also have a high magnetic activity, which in turn can be correlated with events such as coronal mass ejections.