Solar system

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