8th Grade Chapter 1 Lesson 3 pgs.22-26

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8th Grade Chapter 1 Lesson 3 pgs.22-26

  1. 1. 8 th Grade Chapter 1 Lesson 3 Pgs. 22-26 For Student Use Only
  2. 2. Stars <ul><li>Our SUN is a star and is very important to us! </li></ul><ul><li>Our Sun is the center of our Solar System . </li></ul><ul><ul><li>Solar system- the sun and all bodies that orbit it. </li></ul></ul><ul><ul><li>We have a moon, asteroid belt, and now 10 planets. </li></ul></ul>
  3. 3. Stars <ul><li>Sun: </li></ul><ul><ul><li>The sun is an average sized star that provides all the heat, light, and energy we need. </li></ul></ul><ul><ul><li>Make Up of Sun: </li></ul></ul><ul><ul><ul><li>Hydrogen and Helium gases </li></ul></ul></ul><ul><ul><ul><li>Other gases </li></ul></ul></ul><ul><ul><ul><li>High Temperatures </li></ul></ul></ul>
  4. 4. Stars <ul><li>Layers of the Sun/Solar Events </li></ul><ul><ul><li>Photosphere- visible part of the sun </li></ul></ul><ul><ul><ul><li>Surface of sun is seething, bubbling (bubble=granule), boiling layer of gas </li></ul></ul></ul><ul><ul><ul><li>Sunspots- found on surface of the sun and are cooler, darker areas. </li></ul></ul></ul><ul><ul><ul><li>Spicules- flame like columns of gas </li></ul></ul></ul>
  5. 5. Stars <ul><li>Layers of the Sun/Solar Events </li></ul><ul><ul><li>Chromosphere: The layer outside the photosphere. It can only be seen during a solar eclipse. </li></ul></ul><ul><ul><ul><li>Solar Eclipse- when the photosphere gets covered by the moon </li></ul></ul></ul><ul><ul><ul><li>Solar Flares: tremendous bursts of energy </li></ul></ul></ul>
  6. 6. Stars <ul><li>Layers of the Sun/Solar Events </li></ul><ul><ul><li>Chromosphere Events: </li></ul></ul><ul><ul><ul><li>Solar Prominences: streams of gas that erupt from chromosphere and return to look like a loop. </li></ul></ul></ul><ul><ul><li>Corona: surrounds the chromosphere and is a huge, hot blanket of vapor that extends into space </li></ul></ul>
  7. 7. Stars <ul><li>Layers of the Sun/Solar Events </li></ul><ul><ul><li>Corona Events: </li></ul></ul><ul><ul><ul><li>Solar Magnetism affects the Corona and can cause holes </li></ul></ul></ul><ul><ul><ul><li>Solar Winds- high speed stream of charged particles that come from coronal holes. </li></ul></ul></ul>
  8. 8. Stars <ul><li>Star Measurement </li></ul><ul><ul><li>Other than the sun (93,000,000 miles away) , most other stars are very far away </li></ul></ul><ul><ul><li>Stars are so far away we have to use light years. </li></ul></ul><ul><ul><ul><li>Light Year- how far light travels in one year </li></ul></ul></ul>
  9. 9. Stars <ul><li>Star Distance </li></ul><ul><ul><li>Freidrich Wilhein Bessel was the first to measure star distance. </li></ul></ul><ul><ul><ul><li>Used Trigonometry- used Parallax </li></ul></ul></ul><ul><ul><ul><ul><li>Parallax- the apparent change in position of an object caused by the actual change in position of the observer </li></ul></ul></ul></ul><ul><ul><ul><ul><li>For some stars Bessel used opposite sides of Earth’s orbit (ex. Summer and Winter) </li></ul></ul></ul></ul>
  10. 10. Stars <ul><li>Star Distance: </li></ul><ul><ul><li>A Parsec is a unit of measurement for astronomers </li></ul></ul><ul><ul><ul><li>Based on parallax </li></ul></ul></ul><ul><ul><ul><li>Parsec- the distance of an object with a parallax of one arc. 1 parsec=3.26 light years </li></ul></ul></ul>

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