WORDS RELATED TO SPACE

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Across
  1. 1. - Theory of the origin of the universe.
  2. 8. - Study of celestial objects and space.
  3. 9. - Extremely luminous active galactic nucleus.
  4. 12. - Galaxy containing our solar system.
  5. 13. - Person trained to travel in space.
  6. 17. - Instrument for observing distant objects.
  7. 18. - Region of space with strong gravitational pull.
  8. 19. - Luminous celestial body.
  9. 20. - Celestial body orbiting a star.
  10. 23. - Vehicle designed to travel in space.
  11. 26. - System of planets orbiting a star.
  12. 28. - Distance light travels in one year.
  13. 29. - Object orbiting a planet.
  14. 30. - All of space and everything in it.
Down
  1. 2. - Force attracting objects towards each other.
  2. 3. - Planet outside our solar system.
  3. 4. - Cloud of gas and dust in space.
  4. 5. - Hypothetical form of matter in the universe.
  5. 6. - Path of an object around a star or planet.
  6. 7. - Universe seen as a well-ordered whole.
  7. 10. - Explosion of a star.
  8. 11. - Highly magnetized, rotating neutron star.
  9. 14. - Habitable artificial satellite.
  10. 15. - Late stage of a star's life.
  11. 16. - Group of stars forming a pattern.
  12. 21. - Icy body releasing gas and dust.
  13. 22. - Small body entering Earth's atmosphere.
  14. 24. - System of millions or billions of stars.
  15. 25. - Small rocky body orbiting the sun.
  16. 27. - Obscuring of one celestial body by another.