Space Crossword puzzle

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Across
  1. 1. Whats the star signs used for?
  2. 3. Which is the second closest star from us.
  3. 7. Whats in the middle of our galaxy?
  4. 8. Whats the largest, asteroid or meteor?
  5. 10. What planet does the moon Titan orbit?
Down
  1. 2. What is it called when a giant star explodes?
  2. 4. Group with billions of stars.
  3. 5. Whats the name of our galaxy?
  4. 6. What star in our solarsystem is farest away?
  5. 9. Smallest planet in our solarsystem.