The planets and the Sun

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Across
  1. 3. space object that sucks all light and objects near it
  2. 4. pieces of satellites floating in space
  3. 6. space travel unit
  4. 7. first spacecraft on the moon with people
  5. 10. number or moons that Venus has
  6. 11. the red planet
  7. 12. which planet has 500 rings
  8. 14. name for the inner 4 planets
  9. 17. what is the hottest part of the sun
Down
  1. 1. name of our galaxy
  2. 2. age of our galaxy
  3. 3. space creator
  4. 5. where is Kennedy space centre
  5. 8. rings on uranus
  6. 9. spot on Jupiter
  7. 11. which planet has no atmosphere
  8. 12. scorpion star sign
  9. 13. star explosion
  10. 15. the dog star
  11. 16. what made dinosaurs extinct