Astronomy 101 Crossword

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Across
  1. 3. Tombaugh’s ashes en route to this world
  2. 4. number of Galilean Moons
  3. 6. point within ellipse that is home to Sun
  4. 10. collapsed to form our solar system
  5. 11. famous short period comet, will be back in ‘61
  6. 15. first man-made object in space
  7. 16. lowest density Earth layer
  8. 17. primary component of Saturn’s rings
  9. 20. rover solar panel obscuring substance
  10. 21. result of differential gravitational stress on a planet or moon
  11. 22. makes Neptune & Uranus blue
  12. 23. type of radiation you emit
  13. 24. closest celestial neighbor
  14. 26. Mercury has a large one
  15. 27. densest Galilean Moon
  16. 30. Death Star moon
  17. 31. dangerous asteroid (abbrev.)
  18. 32. type of primitive meteorite
  19. 37. longest wavelength of visible light
  20. 41. more are visible in hours preceding sunrise
  21. 42. “chaos and confusion” causing solar system object
  22. 43. two-faced Saturnian moon
  23. 44. avg distance from Earth and Sun (Abbrev.)
  24. 47. term describing increasing illumination of the Moon
  25. 49. product of
  26. 51. high energy form of light
  27. 52. property of a planet that determines seasons
  28. 55. largest of the leftovers
  29. 57. toasty planet
  30. 59. direction in which stars rise
  31. 60. 1 degree = 60 ___minutes
  32. 61. largest, coldest moon of Neptune
  33. 63. Key component of a refracting telescope
  34. 64. largest component of the solar nebula
  35. 65. one Earth orbit
  36. 67. spacecraft in orbit around
Down
  1. 1. also known as northern lights
  2. 2. number of planets with no moons
  3. 5. all jovian planets have them
  4. 7. Asteroid or Kuiper
  5. 8. famous space telescope
  6. 9. rare element indicative of dinosaur killing impact
  7. 12. “clumping” process that formed planets
  8. 13. home to Sun’s absorption lines
  9. 14. primary component of Earth’s core
  10. 18. newest, largest Mars rover
  11. 19. one is often not enough for comets
  12. 22. not seas but actually lava flows
  13. 25. lunar phase that occurs when Moon is between Earth and Sun
  14. 28. type of volcano often confused with impact crater
  15. 29. discoverer of ellipses
  16. 33. spacecraft that “circles” a planet
  17. 34. found in craters near Moon’s poles
  18. 35. distance/time
  19. 36. energy generation process inside Sun
  20. 38. a variable that determines gravitational force
  21. 39. ice giant
  22. 40. two stars in orbit around a common center of mass
  23. 45. white ammonia clouds bands on Jupiter
  24. 46. number of planets visible without telescope
  25. 48. The Milky Way
  26. 50. the solar cycle lasts this many years
  27. 53. 2nd smallest planet
  28. 54. large ball of gas undergoing nuclear fusion in core
  29. 55. atmosphere of a comet
  30. 56. third rock from the Sun
  31. 58. type of eclipse that occurs at
  32. 62. home to CH4 lakes and seas
  33. 66. Brahe pet