... Sunspots: Magnetic Depressions . ... Our Sun has spots! These spots appear dark in photographs like the one above, but in fact sunspots are quite bright - they are just dark compared to the rest of the Sun. Sunspots are about the size of the Earth and frequently occur in groups, as shown above. Mercury in Stereo: Craters Within Craters . ... Grey Sun Seething . ... Blue Sun Glaring . ... Too Close to a Black Hole . ... On the left is a normal star field containing the constellation Orion. ...