Distances In Space

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Distances In Space

  1. 1. Distances in Space
  2. 2. <ul><li>Rotation – the spinning of a body on it’s axis </li></ul><ul><li>Revolution – the spinning of a body around another body (ex. sun) </li></ul>
  3. 3. Perihelion <ul><li>An object’s position closest to the sun along it’s orbit </li></ul>
  4. 4. Aphelion <ul><li>An object’s position furthest from the sun along it’s orbit </li></ul>
  5. 5. Draw and Label <ul><li>Draw the diagram and label APHELION and PERIHELION </li></ul>
  6. 6. Draw and Label <ul><li>Draw the diagram and label APHELION and PERIHELION </li></ul>
  7. 7. <ul><li>Think about Kepler’s Laws of Planetary Motion… </li></ul><ul><li>At which position would the planets move faster? Perihelion of Aphelion? Why? </li></ul><ul><li>Animation </li></ul>
  8. 8. <ul><li>ONE MINUTE PAPER (to be turned in) </li></ul><ul><li>Answer the following question in about 1-2 minutes. Focus on your answer, since the time is limited. </li></ul><ul><li>Is it possible for Earth to be at Perihelion and Mars to be at Aphelion? Explain. </li></ul><ul><li>Draw a diagram of how this would look. </li></ul>
  9. 9. How do scientists measure Distance in Space <ul><li>Podcast /article </li></ul><ul><li>Parallax – see change in apparent position based on location </li></ul><ul><li>Newer technologies such as radar </li></ul>
  10. 10. <ul><li>The distance from Earth to the sun is 1 AU (Astronomical Unit) about 93 million miles </li></ul><ul><li>We can compare the distances in the solar system by AU’s </li></ul><ul><li>But what if something is extremely far away? </li></ul>
  11. 11. Light Years <ul><li>The distance it takes light to travel in one year </li></ul><ul><li>Is the same as: </li></ul><ul><ul><li>6.324×10 4   AU </li></ul></ul><ul><ul><li>or </li></ul></ul><ul><ul><li>5.879×10 ¹²   mi </li></ul></ul>To Infinity…and Beyond

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