Clumps of sun (granule) arising from a very large temperature difference between the core and the photosphere. The temperature at the Sun's core reaches 15 million K, while at 5700 K photosphere Very large temperature differences this causes a very hot gas flow from the core of the sun to the photosphere form clumps. Clumps is called lumps or granules sun. The existence of granular photosphere causing uneven surface. Consequently, in the photosphere formed dark areas called sun spots. Granular state change from time to time. Sometimes the granules look like wicker. Seen with a telescope, granules look like grains of rice that glow. Distance antarbutir also changing. The distance between the two points to reach 2000 km.
Sun spots (sunspots) is the dark area on the photosphere. Dark area is caused by the temperature in the area is lower than the surrounding area. The temperature difference is caused by obstruction of the clouds (clumps) of hot gas from the inside of the sun (the sun's core). This is due to the sun's magnetic field interference. Diameter of sun spots is estimated at 80,000 km. Diameter is much larger than the diameter of the earth. The diameter of the earth about 12,736 miles. Sightings (age) spots the sun is different, there is the age of a few minutes, but there are a few days old. The amount also varies from time to time.