May the force be with you

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