Across
- 4. A huge group of stars
- 7. The number of planets our solar system
- 9. Shooting Stars
- 11. Absorb and give off infrared radiation
- 15. Irregular shaped huge space rocks
- 17. Frozen carbon dioxide
- 18. Name of the last Unit from the book
- 20. The process of going from solid to gas
- 21. The planet that contains oxygen
- 22. The first planet from the sun
- 23. Evidence of an ancient organism
- 24. A cloud made of dirt, gas, and ice.
Down
- 1. A oval orbit
- 2. Made of thousands of galaxies
- 3. Planet that has most potential life
- 5. Young stars surrounded by gas and dust
- 6. We have 8 of these in our solar system
- 8. A push or pull in a certain direction
- 10. One of the two defining points
- 12. A circular motion around a mass
- 13. The center of our solar system
- 14. Light and streams of charged particles
- 16. Natural attraction physical bodies
- 19. Our Galaxy