Across
- 3. Permanent settlement in space
- 5. Illness impacting astronauts
- 6. Points in a two body system
- 7. Sight from space
- 8. Force that pulls objects
- 10. Not large enough to orbit the sun
- 13. Person trained for spaceflight
- 14. Large collection of stars
- 17. Debris in orbit
- 18. Propels into space
- 22. Imaginary sphere around Earth
- 23. All matter and energy
- 24. Reusable spacecraft
- 26. Wide, flat volcano
- 27. Between galaxies
- 29. Twinkling of stars
- 30. Returning to Earth's atmosphere
- 33. Small rocky object
- 35. Radiation left over from Big Bang
- 38. Returning to Earth's atmosphere
- 40. Cloud of gas and dust
- 42. Massive luminous sphere
- 47. Clothing for space travel
- 50. Body of ice and dust
- 53. Habitable artificial satellite
- 54. Conditions in outer space that affect Earth
- 56. Natural or artificial object
- 57. Part of Earth's upper atmosphere
- 60. Extreme gravitational force
- 61. Between stars
- 63. Settlement on the moon
- 64. Location for launching spacecraft
- 67. Natural light display
- 68. Neptunian object Objects beyond Neptune
- 69. Absence of matter
- 72. Propulsion system that uses ions
- 74. Between planets
- 75. Brightness due to gas and dust
- 78. Using gravity for acceleration
- 79. Small dense star
- 80. Group of stars
- 81. Sparse matter between stars
- 82. Region of icy objects
- 83. Increase in frequency due to motion
- 84. Stable location in space
Down
- 1. Fundamental principles of physics
- 2. Not from Earth
- 4. Ionized gas
- 7. Minimum speed to exit gravitational pull
- 9. Earth's natural satellite
- 11. Depressions on a surface
- 12. Unmanned space vehicle
- 15. Boundary where solar wind meets interstellar matter
- 16. Boundary around a black hole
- 19. Hypothetical transportation system
- 20. Layer of gas around a planet
- 21. Study of motion in space
- 25. 12 constellations
- 27. Particle found between stars
- 28. Fine particles of matter
- 29. Relating to the sun
- 31. Dark spots on the sun's surface
- 32. Spacecraft powered by rocket engines
- 34. Path of an object in space
- 36. Explosion of a star
- 37. Strategies to reduce space debris
- 39. Orbits a star
- 41. Magnetic field around a planet
- 43. Large star in later stages
- 44. Small spacecraft
- 45. Travel for recreational purposes
- 46. Multiple telescopes
- 48. Astronomical facility
- 49. Vehicle for moon exploration
- 51. Study of life outside Earth
- 52. Group of galaxies
- 53. Room with sun exposure
- 55. Telescope that detects radio waves
- 58. A streak of light in the sky
- 59. Subatomic particle with low mass
- 62. Optical instrument
- 65. Process of forming a star
- 66. Region of icy objects beyond Neptune
- 70. Bubble created by solar winds
- 71. Radiation belt around Earth
- 73. System of two stars
- 76. Activity outside spacecraft
- 77. Planet outside our solar system