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Sunspot - Wikipedia Within sunspot groups, multiple umbrae may be surrounded by a single, continuous penumbra The temperature of the umbra is roughly 3000–4500 K, in contrast to the surrounding material at about 5780 K, leaving sunspots clearly visible as dark spots
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 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 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 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
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
The Sun and Sunspots - National Weather Service Times of maximum sunspot activity are associated with a very slight increase in the energy output from the sun Ultraviolet radiation increases dramatically during high sunspot activity, which can have a large effect on the Earth's atmosphere
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