Across
- 1. the second-most-massive known dwarf planet
- 3. Way galaxy that contains our Solar System
- 5. is the largest planet in the Solar System
- 6. is in synchronous rotation with Earth
- 7. are minor planets that are not comets
- 9. a massive, gravitational bound system consisting of stars, stellar remnants
- 11. the third planet from the Sun
Down
- 2. defined as the totality of existence, including planets, stars, galaxies
- 4. star at the center of the Solar System
- 6. second smallest planet in the Solar System
- 8. a colorless, odorless gas
- 10. a massive, luminous sphere of plasma