Vocabluary: space, urban, nature

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Across
  1. 3. We call them sleeping policemen
  2. 7. astronouts preferred way to travel(to outer space especially)
  3. 8. The living space on the ISS is the equivalent of one-and-a-half ….. 747s.
  4. 9. The planet in the Sun’s solar system that was thought to be the home planet of aliens.
  5. 10. light's that control the traffic
  6. 11. Andromeda it the closest ... to Earth
  7. 13. a synonym for sidewalk
  8. 14. a ribbon-like body of water that flows downhill from the force of gravity
  9. 16. To what did Piers Sellers compare the food he ate on the space station after losing his taste?
  10. 18. A group of stars that form a pattern
Down
  1. 1. a unit of length in astronomy equal to the distance that light travels in one year
  2. 2. Where Shrek lives
  3. 4. Mars has two of these orbiting around it
  4. 5. where a river meets a larger body of water
  5. 6. a body with such strong gravity that light cannot escape it and that is thought to be caused by the collapse of a massive star
  6. 8. From which country was the astronaut Frank de Winne?
  7. 11. a slowly moving body of ice, usually near the poles
  8. 12. a machine for withdrawing cash
  9. 15. What was NASA called in 1957? Hint:Just change one letter.
  10. 17. a small body of still water formed naturally or by artificial means