17. Space Science

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Across
  1. 3. an artificial body placed in orbit around the Earth to collect information
  2. 5. used to refer to a particular thing and not something general
  3. 9. to increase in size or amount, or to make something increase
  4. 10. an instrument that makes distant objects seem larger and closer
  5. 13. to send a spacecraft or bomb into the sky, or a ship into the water
  6. 15. someone who travels and works in space
  7. 16. relating to, or involving the sun
  8. 18. everything that exists, including stars, space, etc.
  9. 19. an extremely large group of stars and planets
  10. 21. to move around a large object in space such as a planet
  11. 22. clear to almost anyone; easy to understand or see
  12. 23. very important; rare and worth a lot of money
  13. 24. to break suddenly from inside with noise and force
  14. 26. development and improvement of skills, knowledge, etc.
  15. 28. happening or starting from a short time ago
Down
  1. 1. a large, round object in space that moves around the sun or another star
  2. 2. to watch someone or something carefully
  3. 4. to travel to a new place to learn about it
  4. 6. an object in space that leaves a bright line behind it in the sky
  5. 7. to hit something with great force
  6. 8. an important job, usually travelling somewhere
  7. 11. not well known; not easy to understand
  8. 12. to try to discover all the facts about something
  9. 13. relating to the moon
  10. 14. the force that makes objects fall to the ground
  11. 17. to keep people or things apart from each other
  12. 20. to form by putting together; to produce music, poetry, etc.
  13. 23. to say that something will happen in the future
  14. 25. to find out something that you did not know before
  15. 27. the area outside the Earth; an empty or available area