Across
- 1. our star
- 5. the force that formed gas into the stars and planets
- 6. a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter
- 8. a red planet in our solar system
- 9. cosmic explosion
- 11. a sphere of matter that orbits a star
- 12. a source of light and heat
Down
- 2. every thing we know about is in the _________
- 3. the building block of most things in the universe
- 4. a collection of systems usually in a spiral shape
- 7. biggest planet in our solar system
- 8. orbits us
- 10. has rings
- 11. dwarf planet