Sunspot - Wikipedia Sunspots are temporary spots on the Sun's surface that are darker than the surrounding area They are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit convection
Sunspots - NASA Science Sunspots are the visible component of active regions, areas of intense and complex magnetic fields on the Sun that are the source of solar eruptions Sunspots can be seen on the Sun’s photosphere, or visible surface of the Sun
Sunspots Solar Cycle - NOAA NWS Space Weather Prediction Center Sunspots appear in a wide variety of shapes and forms The darkest area of a sunspot (also the first to be observed) is called the umbrae As the sunspot matures (becomes more intense), a less dark, outlying area of well-defined fibril-like structure develops around the umbrae - called penumbra
Sunspots: What are they, and why do they occur? - Space. com Sunspots are dark, planet-size regions of strong magnetic fields on the surface of the sun They can spawn eruptive disturbances such as solar flares and coronal mass ejections (CMEs) These