How Many Stars are in our Solar System????

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TOC Sun Notes 2/10/14I. Starter

• How Many Stars are in our Solar System????
• Hundreds
• Millions
• Billions
• Explain why you chose the answer you picked.

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II. Practice

• Copy the Sun Notes in your Practice Section.

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The Sun
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• One star is inside our Solar System The Sun
• The Sun is
• -Medium size
• -Yellow
• -Dwarf Star

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• Diameter 1,392,000 km
• 5 billion years old
• Distance from the Sun 1AU
• AU is Astronomical Unit 149,600,000 km

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Suns Layers

• Corona
• Visible during a total eclipse appears as a white
  colored halo
• Corona means crown in latin
• Corona extends into space for millions of
  kilometers
• Solar winds are millions of streams of
  electrically charged particles
• Visible with only special equipment
• Can extend 10-12 times the diameter of the sun

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Suns Layers

• Chromosphere
• The middle layer of the suns atmosphere
• It is visible during a total eclipse
• The Greek word Chroma means color
• Below corona
• 3,000 km thick
• Visible only with special equipment

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• Photosphere
• First layer of the Suns atmosphere
• The sun does not have a solid surface, but
  instead when you are looking at the sun, you are
  looking at the photosphere
• The photosphere is considered to be the Suns
  surface layer.
• Visible by naked eye The Part We See!
• 600km thick

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• Convective Zone
• Outermost layer of the suns interior
• Hot gas rises and then sinks here
• The loops formed by sinking cool gas causes
  energy to move towards the suns surface
• Convection currents of suns gases
• 200,000 km thick

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• Radiative Zone
• Region of very tightly packed gas where energy
  moves mainly in the form of electromagnetic
  radiation
• It can take energy up to 100,000 years to move
  through the radiation zone.
• 300,000 km thick
• Extremely dense light takes millions of years
  to pass through

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• Core
• First layer in the suns interior
• Enormous amounts of energy are produced here
  through nuclear fusion.
• Nuclear fusion is hydrogen atoms join to make
  helium atoms
• 200,000km thick
• 15,000,000C

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Sun Facts

• Just like the Earth, The Sun spins on its axis
• The Sun gives off ultraviolet rays
• Suns light takes 8 minutes to reach Earth

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Sun Facts continued

• Galileo was the first scientist to explore and
  observe the sun
• Satellites help us get valuable data from the sun

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Sun Facts continued

• Sunspots
• are cooler areas on the sun on the photospere
• Can affect the Earths weather

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• Solar Flare
• Giant storms on the suns surface that send huge
  electrically charged particles into the Solar
  System
• Prominences
• an eruption of a flamelike tongue of relatively
  cool, high-density gas from the solar
  chromosphere into the corona where it can be seen
  during a solar eclipse or by observing strong
  spectral lines in its emission spectrum.

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• Solar Flares
• a brief powerful eruption of particles and
  intense electromagnetic radiation from the sun's
  surface, associated with sunspots and causing
  disturbances to radio communication on earth
• Solar Winds
• from the sun's corona consisting of a flow of
  charged particles, mainly electrons and protons,
  that interacts with the magnetic field of the
  earth and other planetary bodies.

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Sun Facts continued

• Made of Hydrogen that fuses to Helium
• Gravity pulls the sun into the shape of a sphere.

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III. Application

• Assemble the Layer of the Sun Foldable and place
  it in the Application Section of your journal.

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IV. Connection

• Why do you think the Earth stays in orbit around
  the sun?
• What do you thin would happen if the Earth was no
  longer orbiting around the sun?

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V. Exit

• 7 Sentence Summary of what we learned. DO NOT
  GIVE A LIST OF OUR AGENDA!!!!!
• Include questions you still have of the sun.