1b

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Across
  1. 2. the act of (briefly) seeing sth
  2. 4. to discover
  3. 6. most of the time, mainly
  4. 10. a star
  5. 11. unusual
  6. 15. excited about
  7. 18. interested in sth
  8. 19. the reason for sth
  9. 20. a large object like the Earth that moves
  10. 22. a portable video camera
  11. 23. atmosphere
  12. 24. a person who sees an event take place
Down
  1. 1. a place where action or events take place
  2. 3. slope of a hill
  3. 5. wanting to learn more
  4. 7. a scientific magnifying instrument which allows sb to see stars and other activity in space
  5. 8. to observe and make inquiries about sth
  6. 9. a bright light in the sky when it enters the
  7. 11. to see sth
  8. 12. able to wait without becoming annoyed
  9. 13. the outside surface of the roof ofa building
  10. 14. a piece of rock or metal from space that
  11. 16. to consist of, include
  12. 17. to examine, make notes and look carefully at sth
  13. 21. an invention, often a machine