Across
- 6. The furthest planet from the sun
- 7. A dwarf planet demoted in 2006 because it couldn’t clear its region
- 8. The study of the universe beyond Earth’s atmosphere
- 9. A ball of dust and ice that melts as it gets closer to the sun
- 11. The smallest planet
- 12. A celestial body made of gas that gives off its own heat and light
Down
- 1. An ancient burial site built using astronomy
- 2. A natural satellite of a planet
- 3. An almost spherical body that has cleared its region
- 4. The study of constellations and how they affect the future
- 5. The hottest planet
- 8. A rocky body that orbits the sun
- 10. The biggest planet
- 11. The galaxy Earth is in