Crossword in Space

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Across
  1. 3. an astronomical phenomenon where the Earth is placed between the Sun and the Moon.
  2. 4. the first Hungarian astronaut
  3. 5. space research center of USA
  4. 7. Albert Einstein's best-known theory
  5. 12. person who performing spaceflight
  6. 15. The void space between the celestial bodies of the universe.
  7. 16. the central star of the solar system
  8. 17. part of the earth's crust
  9. 18. famous constellation, the larger one.
Down
  1. 1. the first human who walked on the Moon.
  2. 2. Location of St. Andrew's fault line
  3. 6. it covers 70% of the Earth
  4. 8. nothing can get out of it
  5. 9. the closest Planet to the Earth.
  6. 10. the smallest particle of chemical elements
  7. 11. the largest known planet.
  8. 13. the speed of light propagation
  9. 14. last fired spacecraft