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All About Astronomy
|Our Solar System||Stars||Glossary||Printables, Worksheets, and Activities|
|The Sun||The Planets||The Moon||Asteroids||Kuiper Belt||Comets||Meteors||Astronomers|
|Introduction to the Sun||Solar Structure||Size, Mass||Flares,
||Sun's Birth||Solar Eclipses||Activities,
|Solar Rotation||Sunspots||Sun's Death|
Granules are regions of the sun where hot solar material comes to the solar surface. Granules are about 600 miles (1,000 km) across and only exist for about 5 to 10 minutes before they fade away. It is almost as though the surface of the Sun is bubbling like a pot of boiling water.
What Causes Sunspots?
Sunspots occur where the sun's magnetic field loops up out of the solar surface and cool it slightly, making that section less bright. These disturbances in the sun's magnetic field make the sunspot about 2700°F (1500°C) cooler than the surrounding area.
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