The Universe and planet Earth

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Across
  1. 3. the Earth takes one...... to rotate around itself
  2. 4. how many planets are in the Solar System?
  3. 5. the shape of the revolution of the Earth around the Sun
  4. 6. the sun rises in the .....
  5. 8. the 7th planet from the Sun
  6. 11. the sun sets in the .....
  7. 12. the longest day in the summer
  8. 14. area that has a specific time that all citizens set their clock to
  9. 16. something that isn't straight (for example: the Earth's axis is not vertical, it's ....)
  10. 19. the shape of the Milky Way
  11. 22. the Earth goes around the Sun
Down
  1. 1. the theory that explains the origin of the universe
  2. 2. the imaginary lines which divide the world into different time zones
  3. 7. an imaginary line that runs from the North pole to the South pole
  4. 9. the coldest planet
  5. 10. what vehicle do astronauts travel to space in?
  6. 13. the Earth takes one ...... to revolve around the Sun
  7. 15. the direction the Earth moves in when it's rotating
  8. 17. the movement of the Earth moving in a circle on itself
  9. 18. the four stages of the Earth's rotation ( summer,autumn,winter,spring )
  10. 20. the 2nd planet from the Sun
  11. 21. the most important star in the Milky Way