The Sky Keeps Surprises

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Across
  1. 4. to be unseen
  2. 7. injury
  3. 8. to be startled
  4. 9. the form in which this poem is written
Down
  1. 1. to hold on to a person's possession
  2. 2. to be unstoppable
  3. 3. wispy formations
  4. 5. above us
  5. 6. the start