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Sunspot - Wikipedia High sunspot activity is celebrated by members of the amateur radio community as a harbinger of excellent ionospheric propagation conditions that greatly increase radio range in the HF bands
Sunspot regions | Solar activity | SpaceWeatherLive. com On this page you'll find an overview of all the visible sunspot regions on the Sun together with their properties, images and the chances on solar flares or proton events
Sunspots - NASA Science This video, captured by NASA’s Solar Dynamics Observatory between July 5 to 11, 2017, shows a sunspot moving across the Sun Like freckles on the face of the Sun, sunspots appear to be small features, but size is relative: The dark core of this sunspot is actually larger than Earth
Sunspots and Solar Flares - NASA Space Place The temperature of a sunspot is still very hot though—around 6,500 degrees Fahrenheit! Why are sunspots relatively cool? It’s because they form at areas where magnetic fields are particularly strong These magnetic fields are so strong that they keep some of the heat within the Sun from reaching the surface
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 - Solar and Heliospheric Observatory NOTICE: There is an image outage of the Sunspot images due to a cooling water line burst in the Joint Science Operations Center (JSOC) at Stanford University on 2024-11-26
Sunspot | Solar Flares, Magnetic Fields Sunspots | Britannica Sunspot, vortex of gas on the surface of the Sun associated with strong local magnetic activity Spots look dark only by contrast with the surrounding photosphere, which is several thousand degrees hotter
Sunspots - Center for Science Education If you could cut an average sunspot out of the Sun and place it elsewhere in the night sky, it would be about as bright as the full Moon Sunspots have a lighter, outer section called the penumbra and a darker, central region named the umbra