Topic 9 Lesson 1 - Movement in Space

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Across
  1. 4. 88 groups of stars
  2. 6. Greek word meaning "wanderer"
  3. 9. a Greek scientist who developed the heliocentric model of the universe
  4. 11. a ball of gas or plasma
  5. 12. aligned with the axis of earth directly above north pole
  6. 13. revolution
  7. 15. a path stars appear to take
  8. 16. sun-centered universe
  9. 18. constellations and star patterns remain the ________ from year to year
Down
  1. 1. an object that orbits the sun
  2. 2. a plane or narrow band in the sky
  3. 3. Earth's ______ causes seasonal changes
  4. 5. the belief that Earth is the center of the universe and planets orbit it.
  5. 7. a body that orbits a planet
  6. 8. the bear
  7. 10. an Italian scientist who convinced others that Heliocentric model was correct
  8. 14. constellations visible to you ___ from season to season
  9. 17. cold mixture of dust and ice that develops a long trail of light