sun

                                                        Sunspots appear as darker regions on the Sun. They are regions of concentrated magnetic field and usually appear before solar flares and coronal mass ejections. Sunspots are representative of solar activity, and are therefore more likely to appear during solar maximum. Though just a small spot on the Sun, some can grow to be bigger than Jupiter! While it is never safe to look at the Sun directly, if you have the right filter, you can sometimes see them without any magnification. They are not holes, but cooler regions, making them appear dark against the hot, bright surface of the rest of the Sun.