Across
- 3. The four planets closest to the sun.
- 4. The four planets furthest from the sun.
- 8. A group of stars that make a pattern.
- 10. Earth has a natural one of these orbiting around it.
- 11. These are called "Dirty snowballs".
- 12. Agroup of planets, stars, gas and dust.
- 13. Jupiter has four of these.
Down
- 1. Pluto is one of these.
- 2. Everything that exists is in this.
- 5. It has 8 planets and the sun.
- 6. Rocky objects that orbit the sun.
- 7. The sun is the brightest one in our sky.
- 8. The Earth and the moon are the only one of these that humans have walked on.
- 9. A group of gases that surround the Earth.