3 - (Each bubble is about 700km across The Photosphere-Is...

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Composition of the Sun - The sun is a plasma – an extremely hot gas - Each atom’s electrons are ionized – stripped away from the nucleus - The sun is made mostly of: Hydrogren: 70% Helium: 30% To study the sun we consider its interior and its atmosphere The Outer Parts of the Sun The outer layers of the sun are called the suns atmosphere. It is usually divided into the 3 layers - The photosphere is the layer we see - The chromospheres is just above the photosphere - The corona is the outermost part of the sun. Convection and Granulation Gas in the sun is undergoing convection. Cells of hot gas are bubbling up in the convection zone The gas then cools and sinks down. The top of the convection zone is called the photosphere of the sun.
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Unformatted text preview: (Each bubble is about 700km across.) The Photosphere-Is the apparent surface layer of the sun-Light from the interior leaves the sun at the photosphere-Temperature = 5800 K-Above the photosphere is the Chromosphere. The Corona -Outside the Chromosphere is the sun’s Corona-Its temperature is even hotter than the photosphere: 1 million Kelvin’s.-But, its density is very low.-Because it is hot, it emits x rays. (The corona is only seen from Earth during a total solar eclipse) Solar Wind-The corona expand outwards, becoming the solar wind, which eventually encounters Earth-Sometimes the sun produces solar flare, which bombards the Earth with high-energy particles...
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This document was uploaded on 10/07/2011.

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