Across
- 3. Two hydrogen atoms fuse to form
- 6. Planets made of rocks
- 10. Closest planet to the sun
- 11. Launched the Hubble Teloscope
- 14. The big bang started with a
- 15. A dwarf planet
- 16. Gas clouds in space
- 17. Planets made of gas
- 18. The galaxy earth is in
- 19. Small rocky objects in space
Down
- 1. Furthest planet to the sun
- 2. Galaxies are moving away from each other, and the farther away the galaxy is, the faster it is moving away from us
- 4. Our sun is a
- 5. collection of hundreds of billions of Stars
- 7. Made of dust and ice
- 8. A meteoroid that enters earth's atmosphere
- 9. A meteor that lands on earth
- 12. Large and rocky object that orbits the sun
- 13. A red giant has used up all its...