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Across 3. METEOR THAT REACHES THE GROUND 5. DEBRIS IN THE SOLAR SYSTEM 6. MORE ENERGETIC 7. PARTICLES FLOWING AWAY FROM THE SUN 9. LOCATION IN A PLANE'S ORBIT FARHEST FROM THE SUN 11. HOW FAR LIGHT TRAVELS IN ONE YEAR 16. DEPRESSION 18. STUDY OF THE UNIVERSE 22. PART OF THE SUN YOU SEE 24. APPARENT DISPLACEMENT OF ORIENTATION OF AN OBJECT VIEWED FROM TWO DIFFERENT PLACES 26. MASSIVE ATMOSPHERES OF GAS 27. MERCURY, VENUS, MARS, EARTH 28. LOCATION IN A PLANET'S ORBIT CLOSEST TO THE SUN 29. OUTER PLANETS 30. HOW LONG IT TAKES A GALAXY TO MAKE ONE FULL ROTATION 33. FEMALE HORSE (DARK SPOT ON THE MOON) 35. LIKE A MIRROR 37. START OF FALL 38. OUTER EDGE OF THE SOLAR SYSTEM CONTAINING PLUTO AND OTHER SMALL BODIES 42. LARGEST MOONS OF JUPITER 44. FIRST DAY OF SPRING 45. DISTANCE FROM THE SUN TO THE EARTH 47. THE LINKING OF SEVERAL TELESCOPES 49. ONLY VISIBLE DURING AN ECLIPSE 50. SUN CENTERED 51. SPUTNIK 53. HOW BRIGHT SOMETHING ACTUALLY IS

Down 1. CLOSEST TO EARTH 2. INTERSTELLAR CLOUD 4. BENDING LIGHT 7. BEGINNING OF SUMMER 8. LESS ENERGETIC 10. COLOR-SPHERE 12. EARTH CENTERED 13. UNKNOWN SUBSTANCE NOT EMITTING LIGHT 14. LIKE STARS, BUT NOT 15. DECEMBER 21 17. NORTHERN LIGHTS 19. GROUP OF STARS 20. MILKY WAY 21. COLLAPSED STAR 23. LOCAL ARM 25. MOTION IN THE OPPOSITE DIRECTION 31. EARTH, MARS, JUPITER 32. HOW BRIGHT SOMETHING APPEARS TO BE 34. LENGTH OF TIME REQUIRED FOR ONE FULL ORBIT 36. MOST COMMONLY USED THEORY FOR UNIVERSE BIRTH 39. DEGREE OF ELONGATION OF AN ELLIPSE 40. SO DENSE THAT LIGHT CANNOT ESCAPE 41. FRAGMENTS OF ROCK THAT ORBIT THE SUN 43. NATURAL SATTELITE 46. DIRTY SNOWBALL 48. MOON, GIBBOUS 52. VERY BRIGHT STAR