Across
- 6. Planet with rings.
- 7. Billions of "sparkly" objects seen in the sky at night.
- 8. Former planet, now a dwarf planet.
- 9. Closest planet to the sun.
Down
- 1. E.g. the Milky Way.
- 2. The red planet.
- 3. Extremely hot star that is huge in comparison to Earth.
- 4. Largest planet.
- 5. The planet that humans inhabit.
- 7. _____ System; formed 4.6 billion years ago.