Sunspots (image) University of Copenhagen - Niels Bohr Institute Share Print E-Mail Caption Sunspots occur in pairs with opposite magnetic polarity. This can be illustrated as a large horseshoe-shaped magnet below the surface of the star. Credit Credit: NASA Usage Restrictions Credit: NASA Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.