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- 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
- 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 - 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
- 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
- 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
- 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
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