Sunspot - Wikipedia The emergence and evolution of a sunspot group over a period of two weeks The appearance of an individual sunspot may last anywhere from a few days to a few months, though groups of sunspots and their associated active regions tend to last weeks or months
Sunspots: What are they, and why do they occur? | Space The total number of sunspots varies during the 11-year solar cycle, sometimes called the sunspot cycle, with the peak of sunspot activity coinciding with the solar maximum and a sunspot
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 The images are provided by the Solar Dynamics Observatory (SDO) mission
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 This page is updated daily and the sunspot images every hour
Sunspots and Solar Flares - NASA Space Place They appear dark because they are cooler than other parts of the Sun’s surface 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
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
What are Sunspots and What Causes Them? | High Point Scientific Sunspots often form in groups, with each sunspot usually somewhere between 10,000 and 50,000 miles (16,000 to 80,000 kilometers) in diameter In comparison, the Earth is just under 8,000 miles (13,000 kilometers) in diameter, so the vast majority are larger than the Earth
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
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