The Solar System 7th grade Science

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Across
  1. 4. sun-centered solar system
  2. 7. our solar system's star; center of our universe
  3. 8. Ancient Greek astronomer
  4. 10. German mathematician from 1600s
  5. 12. an Italian astronomer from the 1600s
  6. 15. second planet from the sun
  7. 17. an Earth-centered explanation of our solar system
  8. 18. the sixth planet from the sun
Down
  1. 1. first planet from the sun
  2. 2. the planet we live on and the third planet from the sun
  3. 3. a Danish astronomer from the late 1500s
  4. 5. the tendency of a moving object to continue traveling in a straight line
  5. 6. a Polish astronomer from the early 1500s
  6. 9. the fourth planet from the sun
  7. 11. the eighth planet from the sun
  8. 12. a language from the country of Greece
  9. 13. the ninth planet from the sun
  10. 14. fifth planet from the sun
  11. 16. the seventh planet from the sun