Earth & Space

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