what is sunspot
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- He explained that the Sunspot is the spot that appears on the surface of the sun- Photosphere - and is characterized by low temperature than the surrounding areas and has intensive magnetic activity preventing heat loading, and forming a low surface temperature zones.
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Question: Sunspots do not appear everywhere on the Sun. They are usually concentrated in two bands, about 15 - 20 degrees wide in latitude, that go around the Sun on either side of the solar equator. The average latitude of those bands varies with the solar cycle. Just after the minimum of the solar cycle, sunspots appear at an average latitude of about 25 - 30 degrees (both north and south of the equator). As the solar cycle progresses, newer sunspots appear closer and closer to the equator.
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Lesson 3 - The Sun Sunspots are areas of gas on the sun's surface that are cooler than the gases around them. Cooler gases don't give off as much light as hotter gases, which is why sunspots look dark.
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How Hot Is the Sun? At the core of the sun, gravitational attraction produces immense pressure and temperature, which can reach more than 27 million degrees F (15 million degrees C). Hydrogen atoms get compressed and fuse together, creating helium. This process is called nuclear fusion.t is here that the sun's radiation is detected as sunlight. Sunspots on the photosphere are cooler and darker than the surrounding area. At the center of big sunspots the temperature can be as low as 7,300 degrees F (4,000 degrees C).
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- Sunspots on Skin. Sunspots or Solar lentigines are dark portions of the skin that develop after prolonged exposure to direct ultra violet or UV rays. People of all ages are susceptible to these spots, though those with lighter skin tend to develop them more frequently.
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- From 1645 to 1715, there was a drastically reduced number of sunspots. This period of reduced solar activity, which was first noticed by G. Spörer, was later investigated by E.W. Maunder, is now called the Maunder Minimum.
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Why are Sunspots dark? Yes, it's A. And sunspots aren't really 'dark', they're just nowhere near as 'bright' as the rest of the coronal mass around them. You certainly wouldn't want to look directly at one without a lot of optical filtering (such as a welders hood).
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Sun Sunspots are spots on the photosphere, or surface of the Sun. These occur due to magnetic activity that reduces the surface temperatures. These occur only once every eleven years. These spots can spread to be 50,000 miles in diameter.
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sunspot one of the relatively dark patches that appear periodically on the surface of the sun and affect terrestrial magnetism and certain other terrestrial phenomena. sun·spot. Any of the relatively cool dark spots that appear in groups on the surface of the sun.
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The Sunspot Cycle The length of the sunspot cycle is, on average, around eleven years. But the length of the cycle does vary. Between 1700 and today, the sunspot cycle (from one solar min to the next solar min) has varied in length from as short as nine years to as long as fourteen years. Sometimes it is hard to get an exact count of number of sunspots on the Sun.
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- 1. An area that is sensitive to light and functions somewhat like an eye, found in certain single-celled organisms as well as many invertebrate animals. 2. A round marking resembling an eye, as on the tail feather of a peacock.yespot. n. 1. (Biology) a small area of light-sensitive pigment in some protozoans, algae, and other simple organisms. 2. (Biology) an eyelike marking, as on the wings of certain butterflies.
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The Sun and Sunspots Flare Characteristics. Solar flares are tremendous explosions on the surface of the Sun. In a matter of just a few minutes they heat material to many millions of degrees and release as much energy as a billion megatons of TNT. They occur near sunspots, usually along the dividing line (neutral line) between areas of oppositely directed magnetic fields.
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Why are sunspots darker than the rest of the Sun? Sunspots appear dark (in visible light) because they are much cooler than the rest of the surface of the Sun. However, even though they appear dark, they are still very hot. Sunspots have temperatures around 6,300 Fahrenheit (~3,500 Celsius) while the surrounding surface of the sun has a temperature of about 10,000 Fahrenheit (5,500 Celsius). If a sunspot was alone in space, it would glow brightly. 1  Javascript must be enabled to use Cool Cosmos. 2  Learn how.
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Maunder Minimum Maunder Minimum. The Maunder Minimum, also known as the prolonged sunspot minimum, is the name used for the period starting in about 1645 and continuing to about 1715 when sunspots became exceedingly rare, as noted by solar observers of the time. The term was introduced after John A. Eddy published a landmark 1976 paper in Science.
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Definition of Sunspot Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere. Sunspots usually appear in pairs, with pair members of opposite magnetic polarity.
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- The number of sunspots fluctuates significantly. The incidence of sunspots is related to the level of the Sun's activity and changes in an 11-year cycle. During a minimum of the sunspot cycle there are often periods of several months during which no spots can be seen. At a sunspot maximum there can be hundreds of them.
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Ask The Professor What are sunspots, and do they affect the Earth's weather? This month’s expert, Kenneth R. Lang, professor of astronomy, responds: To most of us, the sun looks like a perfect, white-hot globe, round, smooth and without a blemish. But detailed scrutiny shows that it is often pitted with dark spots, called sunspots.
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Sunspots and Solar Storms The sunspots represent cooler regions on the Sun's surface. Chaisson & McMillan report typical temperatures of 4500K for the umbra and 5500K for the penumbra, compared to about 5780K as the effective surface temperature of the Sun's surface.
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- Sunspots are magnetic regions on the Sun with magnetic field strengths thousands of times stronger than the Earth's magnetic field. Sunspots usually come in groups with two sets of spots. One set will have positive or north magnetic field while the other set will have negative or south magnetic field. The field is strongest in the darker parts of the sunspots - the umbra. The field is weaker and more horizontal in the lighter part - the penumbra. Click on image for larger version.
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Sunspots and Solar Storms Galileo was the first to study dark spots on the Sun which we call sunspots. They typically measure about 10,000 kilometers across, which makes them on the order of the size of the Earth. They often occur in groups, and come and go.
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How Hot Is the Sun? The temperature in the photosphere is about 10,000 degrees F (5,500 degrees C). It is here that the sun's radiation is detected as sunlight. Sunspots on the photosphere are cooler and darker than the surrounding area.At the center of big sunspots the temperature can be as low as 7,300 degrees F (4,000 degrees C).The chromosphere, the next layer of the sun's atmosphere is a bit cooler — about 7,800 degrees F (4,320 degrees C).t is here that the sun's radiation is detected as sunlight. Sunspots on the photosphere are cooler and darker than the surrounding area. At the center of big sunspots the temperature can be as low as 7,300 degrees F (4,000 degrees C).
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Earthtalk: Do sunspots and solar flares affect climate change? – David Noss, California, Md. A: Sunspots are storms on the sun’s surface that are marked by intense magnetic activity and play host to solar flares and hot, gassy ejections from the sun’s corona. Scientists believe that the number of spots on the sun cycles over time, reaching a peak every 11 years or so.
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At what temperature does a forest fire burn? And if you want to talk about high temperatures, the surface of the sun is 6,000°C (11,000°F). The cooler dark-colored sunspots are only 4,000°C (7,000°F). The core of the sun is a little warmer: 15,000,000°C (27,000,000°F).
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- What is an area of gas on the sun that is cooler than other surrounding gases called? Why are sunspots cooler than surrounding areas on the suns surface? Sun spots are areas where there is less matter, and though radiation can account for a lot of heat, where there's energetic matter, it's hottest.
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Ask The Professor Because they are relatively cool, sunspots appear dark, in contrast to their bright surroundings. A sunspot might have a temperature of 3,500 kelvin (5,840.3 degrees Fahrenheit), for example, instead of the 5,780 kelvin (9,944.3 degrees Fahrenheit) of adjacent regions.