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The Sun

Chapter 16. The Sun. Heliocentric vs. Geocentric. The geocentric model was not agreed upon by all Greek scientist and they created another model. This model was further developed by polish astronomer Nicolaus Copernicus

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The Sun

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  1. Chapter 16 The Sun

  2. Heliocentric vs. Geocentric • The geocentric model was not agreed upon by all Greek scientist and they created another model. • This model was further developed by polish astronomer Nicolaus Copernicus • In a heliocentric system, Earth and the other planets revolve around the sun. • This was later supported by Galileo Galilei, using the telescope. • Greek astronomers thought the universe was perfect and Earth was at the center • In a geocentric system Earth is at the center of the revolving planets and stars

  3. The sun’s interior consists of the core, the radiation zone, and the convection zone The sun is made up of three-fourths hydrogen and one-fourth helium. There are other elements present in small amounts. The Sun’s Interior

  4. The core is the central region of the sun and it is where energy is produced The energy is created through nuclear fusion, where hydrogen is turned into helium This can only take place because the sun is approximately 15 million degrees Celsius The Core

  5. This middle zone is a region of very tightly packed gas where energy is transferred in the form of electromagnetic radiation. Since this zone is so dense it may take more than 100,000 years to move through it Radiation Zone

  6. Outermost layer of the sun’s interior This layer helps to transfer energy to the sun’s atmosphere through convection currents Convection Zone

  7. If you look at a typical image of the sun, which layer do you see? What are the layers of the sun’s atmosphere from innermost to outermost? During what event could you see the sun’s corona? Define: Corona, Chromosphere, and Photosphere Sun’s atmosphere (pg 562)

  8. Define: Sun spots, solar winds, prominences and solar flares Features of the Sun

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