among the planets

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Across
  1. 4. What do we call giant collections of stars far out in space?
  2. 6. What object has gravity so strong that even light cannot escape?
  3. 8. Which planet is closest to the Sun?
  4. 9. Which planet has faint rings and very cold temperatures?
  5. 11. What do we call beings that come from another planet?
  6. 13. Who travels into space in a rocket?
  7. 14. Which planet is the biggest in the solar system?
Down
  1. 1. what planet has life on it
  2. 2. Which planet is known as the Red Planet?
  3. 3. Which planet is dark blue and very cold?
  4. 5. what planet has rings
  5. 7. Which planet spins slower than any other planet?
  6. 10. What is the name of the star at the center of our solar system?
  7. 12. What shines in the night sky and looks like tiny lights?
  8. 15. Which dwarf planet used to be the ninth planet in our soler system