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Sunspots- Sunspots are areas on the Sun's surface that are cooler and less bright than it's surrounding places.

All sunspots are darker and appear darker than surrounding areas of the Sun. Sunspots can be seen mostly
with the naked-eye. The Sun is not the only star that has been seen with sunspots on it. The sunspots are caused by the Sun's magnetic field welling up to the photosphere. The sunspot's magnetic field is around 2,500 times stronger than the Earth's magnetic field. Some largest sunspots that are observed have a diameter of about 500,000 km. The sunspot cycle is a regular pattern where sunspots appear, increases and decreases in pattern. Many sunspots show up in groups, at most 100 a time. The sunspot cycle is a period of where sunspots are seen for approximately 11 years but sunspots are not permanent. Sunspots at the Sun's equator take around 25 days to make one rotation, and near the poles it takes 35 days to complete one rotation.blue.jpg When their are sunspots on the Eath they move across the earths suface contracting and expanding while they are moving. When they made the invention of the telescope that is when astronomers first started looking at sunspots. Only 100 sunspots can be on the sun at once. They may look small from Earth but they can really be as big as Earth or Mars. Sunspots can last for weeks or months. The number of them goes up and down in a cycle. Because of the rotation sunspots will disappear then they will re-appear. There are not just spots on the sun but also on some stars, these are called star spots. When there were dust storms or overcast days when the suns's rays were blocked ancient people noticed that there were spots on the sun. One of the largest sun spots is up to 50,000 km, and it can be seen with the naked eye. Sun spots come in groups with 100 spots in each group. You may be wondering how sun spots are formed. Well they are cause by the sun's magnetic field welling up to the photosphere. They always form in pairs of two, one of the spots has the north pole and the other has the south. The reason for this is because they are magnetic.
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In the year 1613, Galileo discovers sunspots. 1859, Heinrich Schwabe discovers the sunspot cycle. On March 29, 2001 the active region 9393 becamethe biggest sunspot since the year 1991. A English monk named John of Worcester made the first picture of a sunspots in the year 1128. There was a time called the Maunder Minimum and it was where there were not that many sunspots on the sun. This took place in the years 1645 to 1715. The sunspot counts have been higher then usual since around the year 1900. When Galileo saw these sunspots he did not think that they were really on the sun, because a church that he went to taught that the heavens were perfect so that there could not be any spots on the sun.