Solar System

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Across
  1. 3. Darkest central part of the shadow
  2. 4. Model, Earth is stationary while objects in the sky move around it
  3. 6. Planets would form from the outer part of the disk and sun from the center
  4. 8. solar system formed a rotating cloud of dust and gas Shock waves caused the cloud to collapse.
  5. 11. Model, Earth and planets revolve around the sun
  6. 12. When the moon casts a shadow on Earth
  7. 14. Change between high and low tides is greatest
Down
  1. 1. When Earth casts a shadow on the moon
  2. 2. outer solar system, large with low density
  3. 5. German mathmetician, determined the orbit of a planet is an ellipse
  4. 7. Distance in space is measured with
  5. 9. Telescope from 1990
  6. 10. When a shadow of one body falls on another
  7. 13. Neil Armstrong was commander and first man on moon until Appolo 17
  8. 15. Change between high and low tides is least