Solar system

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Across
  1. 2. Planet with brightest rings
  2. 4. Objects made of snow, ice and dust
  3. 5. A dwarf planet
  4. 6. The closest planet to the sun
  5. 8. Takes 84 years to travel around the sun
  6. 11. Furthest planet from the sun
  7. 12. Tiny materials that flout in space
  8. 15. Regions of space where nothing escapes
  9. 16. The biggest planet
  10. 17. The name of our galaxy
  11. 18. The planet we live on
Down
  1. 1. The hottest planet
  2. 2. High speed stream of charged particles
  3. 3. Group of stars bound together
  4. 6. Orbits around Earth
  5. 7. Small rock body orbiting the sun
  6. 9. The biggest star in our solar system
  7. 10. Planet with the most moons
  8. 13. What the sun is
  9. 14. Lumps of rocks that fall to earth