Across
- 2. dimensions which all things exist and move.
- 5. death of a star causing it to explode
- 6. a ice and rocky object
- 9. a ball of plasma and gas fusing
- 10. a word to describe a tiny version
- 11. a dwarf planet
- 14. the red planet
- 16. object with gravity that light can't escape
- 18. the center of a black hole
- 20. our solar systems star
- 21. the planet we live on
Down
- 1. gas and dust which stars live in
- 2. the planet with rings
- 3. study of space
- 4. the biggest planet
- 7. a type of galaxy with spiral arms
- 8. is a piece of an asteroid heading to earth
- 12. the force that pulls you in closer
- 13. a type of galaxy that looks like an egg
- 15. possible intelligent life outside of earth
- 17. a grouping of celestial objects
- 19. an object with trillions of stars and gas