Across
- 5. A person trained to travel in a spacecraft
- 8. Largest planet in the solar system
- 9. Name of the closest galaxy to the milky way
- 11. A self luminous celestial body of great mass
- 12. Sometimes called a shooting star
Down
- 1. One of Saturn's moons
- 2. Second largest moon in the solar system
- 3. Dwarf planet in our solar system
- 4. An artificial object intentionally placed into
- 6. Named after the Roman god of water and the sea
- 7. Closest planet to the Sun
- 10. A small, rocky object that orbits the Sun