Day 1

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How has mankind's need to explore led to our current view of the solar system? A New American Lecture

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Day 1

  1. 1. Exploration: How new knowledge has led to our current view of the solar system. EQ: How has mankind’s need to explore led to our current view of the solar system?
  2. 2. Warm Up – Page 170 <ul><li>What do you know about how our views of the solar system have evolved since humans first gazed up at the stars? </li></ul><ul><li>Imagine you live 5,000 years ago. When you look up at the night sky, what do you think about what you see? </li></ul>
  3. 3. Our First Views of the Universe <ul><li>Egyptians – need a way to predict the annual flooding of the Nile River </li></ul><ul><li>Studied the star Sirius and noticed it was in the morning sky every spring shortly before the flooding began </li></ul>
  4. 4. Our First Views of the Universe <ul><li>Mayans – developed a calendar that was centuries before their time </li></ul><ul><li>Observed the solstices </li></ul>
  5. 5. Our First Views of the Universe <ul><li>Stonehenge </li></ul><ul><ul><li>Built in several stages </li></ul></ul><ul><ul><li>We don’t know who built it or exactly why </li></ul></ul><ul><ul><li>It does have connections to the summer and winter solstices </li></ul></ul>
  6. 6. Our First Views of the Solar System: Reflect <ul><li>M: Restate the reason why Egyptians' exploration of the night sky was important. </li></ul><ul><li>I: Which of the three ancient societies would you have preferred to explore the sky with? Why? </li></ul><ul><li>U: What are the similarities in the explorations of the people who built Stonehenge and the Mayans? </li></ul><ul><li>S: Imagine you are looking up at the stars in 3,000 B.C. How can you explore them? </li></ul>
  7. 7. Beginning to Make Sense of the Universe <ul><li>Greeks observed the planets. </li></ul><ul><ul><li>Called them wandering stars </li></ul></ul><ul><ul><li>Were aware of 5 planets – Mercury, Venus, Mars, Jupiter, and Saturn </li></ul></ul>
  8. 8. Beginning to Make Sense of the Universe <ul><li>Aristotle </li></ul><ul><ul><li>Placed the earth at the center of the solar system surrounded by 55 crystalline spheres – GEOCENTRISM </li></ul></ul><ul><ul><li>Earth did not move at all </li></ul></ul><ul><ul><li>Everything revolved around the Earth </li></ul></ul>
  9. 9. Beginning to Make Sense of the Universe <ul><li>Ptolemy </li></ul><ul><ul><li>Refined geocentric model of the solar system </li></ul></ul><ul><ul><li>Epicycles – smaller circles around large circles to help explain planetary motion </li></ul></ul><ul><ul><li>Messy way to explain the movement of planets </li></ul></ul>
  10. 10. Epicycles <ul><li>Used to explain retrograde rotation – the apparent backward movement of planets </li></ul>
  11. 11. Beginning to Make Sense of the Universe: Reflect <ul><li>M: Summarize the contributions of Aristotle and Ptolemy to our understanding of the solar system. </li></ul><ul><li>I: How would you feel if I told you the Earth really is the center of the solar system? </li></ul><ul><li>U: Contrast Aristotle and Ptolemy’s discoveries about the solar system. </li></ul><ul><li>S: Design a NASA mission patch dedicated to studying geocentrism. </li></ul>
  12. 12. The Revolution Begins <ul><li>Copernicus </li></ul><ul><ul><li>Published Revolutionibus Orbium Coelestium (On the Revolution of the Celestial Orbs) the year he died </li></ul></ul><ul><ul><li>Math based </li></ul></ul><ul><ul><li>Introduced the heliocentrism – the sun is the center of the solar system </li></ul></ul>
  13. 13. Copernican Solar System

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