End Of Days

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Across
  1. 6. circle-like
  2. 7. known or overt
  3. 10. flying (or gliding)
  4. 11. making a joke of a bad/serious situation
  5. 14. adjustment or change
  6. 15. disturbing
Down
  1. 1. flew by (zoooom)
  2. 2. openly
  3. 3. space physics
  4. 4. duty
  5. 5. disaster
  6. 8. development
  7. 9. not discovered or known
  8. 12. estimated time of arrival
  9. 13. not needed