Chapter 26 The Sun The Sun Is a star Is a main sequence star

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Presentation transcript:

Chapter 26 The Sun The Sun Is a star Is a main sequence star 1 million Earth’s would fit inside the sun 1.4 million kilometers from earth

Hertzberg- Russel Diagram Shows stars in their different stages

The union of hydrogen atoms into helium 4H = 1 He What happens when a star runs out of its fuel – hydrogen? It either becomes a red giant or a supergiant Our sun will become a red giant Fuel for the Sun is Fusion..

Star life cycle

Sun’s layers Core Photosphere Chromosphere 15,600,000 oC – dense! The apparent bright yellow surface of the sun Outer layer around the photosphere – reddish appearance; where solar prominences occur Sun’s layers Core Photosphere Chromosphere

Corona Thin outer atmosphere….only part of the sun visible during a total solar eclipse

Solar Prominences Solar Prominences

Solar Flare Strong magnetic storm on the surface of the sun – thousands of miles tall!

Sunspots Dark spots on the photosphere Areas of high magnetic field - 1000X stronger They appear to move so they gave proof that the sun rotates

Flow of electrically charged particles off of the sun (p+ and e-) Cause auroras Solar Prominences

What is the center of our solar system? Geocentric Ptolemy’s theory of an Earth-centered solar system Geo – mean EARTH -centric means CENTERED Early astronomers thought that everything revolved around the earth – WRONG!!!!!!

Heliocentric Copernicus’ idea of a sun-centered solar system

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