Word work list three! :)

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Across
  1. 1. A person trained for spaceflight
  2. 3. someone who watches something.
  3. 6. a shape with three corners
  4. 8. someone highly skilled in astrology
  5. 11. to move something to a later date
  6. 12. A bike with three wheels
Down
  1. 2. written about themselves
  2. 4. A persons own signature
  3. 5. a certain type of eyeglasses
  4. 7. something worked on.
  5. 9. A series of three books,plays,movies etc.
  6. 10. Te study of the stars