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Across
  1. 3. Arm: is a spiral arm of our galaxy
  2. 7. A planet in our solar system also known as The Blue Planet
  3. 9. The 2nd largest planet in our solar system
  4. 10. it is an opaque star, without its own light
  5. 12. The smallest planet in our solar system, that time ago was confused with a moon. bv n ujkn j
  6. 15. The biggest planet in our solar system.
  7. 16. Way: Vast haze, in the form of a discontinuous band
  8. 17. Low volume planet whose orbit is between those of Mars and Jupiter.
  9. 22. Person who is part of the crew of a spacecraft or who is trained and prepared to do so.
  10. 24. Physical space is the place where objects are found
  11. 26. National Aeronautics and Space Administration
  12. 27. Person who takes a trip, especially long.
  13. 28. His name comes from a greek god.
Down
  1. 1. Gaseous layer that surrounds a star; especially, the one that surrounds the Earth.
  2. 2. A little rock that rotates around planet Earth.
  3. 4. the second planet in the solar system in order of distance from the Sun
  4. 5. It is the limit in which the celestial vault is divided
  5. 6. System: set of stars and celestial matter that gravitates in an orderly manner around the sun.
  6. 8. The closest planet to the sun.
  7. 11. The center of our solar system.
  8. 13. It is the eighth planet in distance from the Sun and the furthest in the solar system
  9. 14. :A fragment of a body from outer space that enters the atmosphere at high speed and falls on Earth.
  10. 18. is a luminous plasma spheroid that maintains its shape due to its own gravity
  11. 19. The fourth planet in our solar system.
  12. 20. : That encompasses the entire world, the entire human universe.
  13. 21. Set of everything that has physical existence, on Earth and outside it.
  14. 23. A vehicle or machine designed to fly in outer space.
  15. 25. is a dwarf planet in the solar system located after the orbit of Neptune