Ch. 3 Sec. 1  Observing the Solar System
ancient Greeks called planets     wandering stars
astronomers Ptolemy Copernicus Galileo Johannes Kepler Isaac Newton geocentric system heliocentric system discoveries  sup...
geo centric system   <ul><li>Earth  @ ctr. of revolving planets  </li></ul>
Ptolemy’s geocentric system the planets move on small circles that move on bigger circles
heliocentric system <ul><li>Earth & planets revolve around Sun </li></ul>
Galileo’s  discoveries that  supported  heliocentric model used telescope  to discover 4 moons revolving around Jupiter Ve...
Phases of Venus
ellipse  = elongated circle (oval shape) Kepler
MULTIPLE CHOICE A B D C Play
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8th Grade-Ch. 3 Sec. 1 Observing the solar system

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8th Grade-Ch. 3 Sec. 1 Observing the solar system

  1. 1. Ch. 3 Sec. 1 Observing the Solar System
  2. 2. ancient Greeks called planets  wandering stars
  3. 3. astronomers Ptolemy Copernicus Galileo Johannes Kepler Isaac Newton geocentric system heliocentric system discoveries supported heliocentric system shape of planets’ orbits= ellipses (elongated circle) inertia & gravity keep planets in orbit
  4. 4. geo centric system <ul><li>Earth @ ctr. of revolving planets </li></ul>
  5. 5. Ptolemy’s geocentric system the planets move on small circles that move on bigger circles
  6. 6. heliocentric system <ul><li>Earth & planets revolve around Sun </li></ul>
  7. 7. Galileo’s discoveries that supported heliocentric model used telescope to discover 4 moons revolving around Jupiter Venus has phases
  8. 8. Phases of Venus
  9. 9. ellipse = elongated circle (oval shape) Kepler
  10. 10. MULTIPLE CHOICE A B D C Play

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