Planets of the Solar System

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Across
  1. 3. Regular oval shape
  2. 9. Group of stars
  3. 11. Difference between high/low tide
  4. 13. Meteor surviving atmosphere
  5. 17. Less dark outer part of sunspot
  6. 18. Atmospheric phenomenon
  7. 21. Force of attraction between masses
  8. 24. Small planet lacking criteria
  9. 26. Star which earth orbits
  10. 29. Small body moving in solar system
  11. 31. Instance of revolving
  12. 33. Large body of matter in orbit
  13. 34. Unit of measurement
  14. 37. After new/full moon
  15. 38. Earth as center
  16. 39. Sun as center
  17. 40. Rotating around axis
  18. 41. Point in orbit where far from sun
  19. 42. Has nucleus of ice and dust
  20. 43. Rising and falling of sea
  21. 44. Angular distance of place north/south
Down
  1. 1. Electric/magnetic field travel waves
  2. 2. Tide after new/full moon
  3. 4. Dark central part of sunspot
  4. 5. Four divisions of year
  5. 6. Sun obscured by moon
  6. 7. Act of rising
  7. 8. Smaller part of visible surface
  8. 10. Explore or examine with tool
  9. 12. Time sun crosses celestial equator
  10. 14. Instrument where far turns close
  11. 15. Three laws
  12. 16. Force attracting body towards earth
  13. 18. Natural satellite of earth
  14. 19. Sun with celestial bodies surrounding
  15. 20. Luminous point in sky
  16. 22. Celestial body in elliptical orbit
  17. 23. Angular distance of celestial equator
  18. 25. Point in orbit when close to sun
  19. 27. Passing into shadow of celestial body
  20. 28. Imaginary line dividing earth
  21. 30. Movement where warmer parts move up
  22. 32. Angular distance of place east/west
  23. 35. Optical instrument
  24. 36. Small rocky body orbiting sun