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