Across
- 3. theory about start of universe
- 6. small particles of matter in space
- 7. another name for universe
- 9. scientist who studies universe
- 11. a piece of rock that lands on earth surface
- 13. area of space with very strong gravity
- 14. a massive blackhole that sucks in materials
- 16. large rocks that float in space
- 18. a cloud of gas and dust in space
- 19. distance light travels in one year
Down
- 1. when the moon gradually becomes invisible
- 2. a building where astronomical observations are made
- 4. a celestial body that orbits a star
- 5. subject related to space
- 7. a group of stars that form a pattern
- 8. closest galaxy to earth
- 10. an object intentionally placed into space to collect information
- 12. planet next to earth
- 15. name of our galaxy
- 17. stars that are small and cooler