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| Zoom Astronomy's THE SUN |
| Introduction to the Sun | Solar Structure | Size, Mass | Flares, |
Sun's Birth | Solar Eclipses | Activities, Web Links |
|---|---|---|---|---|---|---|
| Solar Rotation | Sunspots | Sun's Death |
Sunspots are relatively cool, dark patches on the sun's surface. They come in many shapes and sizes; they often appear in groups. These spots are much bigger than the Earth; they can be over 10 times the diameter of the Earths.
Granulation is solar granules together with intergranular lanes (dark, cool areas between granules where solar material is descending into the surface). Granulation covers the visible surface (the photosphere) of the Sun.
GRANULES:
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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