December 20,2011.

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Presentation transcript:

December 20,2011

Identify the cyclic behavior of sunspots Sun Notes Sunspot Analysis Objective Agenda Identify the cyclic behavior of sunspots Sun Notes Sunspot Analysis Sun Video TEST IS THURSDAY! Hand out Review Sheet

The Sun

THE SUN Diameter: 1,390,000 km Temperature: 5800 K (surface) 15,600,000 K (core) Chemical composition: Hydrogen 92.1% Helium 7.8% Other: 0.1%

The Sun and its Planets to Scale

Energy is created in the core when hydrogen is fused to helium..

The equator of the Sun rotates faster than the poles of the Sun.

Sunspots Appear as dark spots on the surface of the Sun. Temperatures drop to about 3700 K (compared to 5700 K for the surrounding photosphere).

Sunspots have reached a maximum about every 11 years since 1700. Because the pre-1700 period of low sunspot activity coincides with a prolonged cool period that is sometimes called the Little Ice Age, some scientists have speculated that sunspot activity and climate are connected somehow.

Solar Flares Solar flares are tremendous explosions on the surface of the Sun. They occur near sunspots.

Solar Wind Solar wind is the continuous flow of charged particles (ions, electrons, and neutrons) that comes from the Sun in every direction.

Anticipated Future of the Sun

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