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