Our Sun is not at all stable, however, it is a seething, bubbling cauldron of hot gas.
Sunspots come and go.
Occasionally, sunspots on the Sun are large enough to be visible to the naked eye. Everyday, we observe and keep record of the sunspot activities. The purpose of the observation is to collect data of sunspot activity for future research. Sunspot are regions of the photosphere where the gases are up to 1500K cooler than those of the surrounding photosphere. Sunspots are nevertheless hotter than the surfaces of many stars.