Sunspots are dark patches present on the surface of Sun. These patches appear dark because they are cooler than their surrounding area. Sunspots form due to strong magnetic field lines coming up from within the Sun through the solar surface. Sunspots can be as big as the Earth or very tiny. These spots can be spotted with naked eyes through clouds. The gas clouds surrounding these spots are called faculae while huge loops of gases that come out of these spots are called prominences. Sunspots were independently studied by Galileo Galilei, Johannes Fabricius, Thomas Harriot and Christoph Scheiner.
What are Sunspots?
