Space conquest

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Across
  1. 5. the act of conquering a country, area, or situation
  2. 6. a cylinder-shaped device for making objects that are far away look closer and larger.
  3. 7. an expert who studies or works in one of the sciences.
  4. 8. to (cause to) arrive on the ground.
  5. 9. a projectile that can be propelled to a great height or distance by the combustion of its contents.
  6. 12. a chemical element that is a gas with no smell or colour.
  7. 14. the round object that moves in the sky around the earth and can be seen at night.
  8. 15. a device sent up into space to travel around the Earth.
  9. 16. the activity of searching and finding out about something.
  10. 17. the planet fifth in order of distance from the Sun.
  11. 18. a dwarf planet that is farther away from the sun than Neptune.
Down
  1. 1. an object seen in the sky that is thought to be a spacecraft from another planet.
  2. 2. the empty area outside Earth's atmosphere, where the planets and the stars are.
  3. 3. a machine controlled by a computer that is used to perform jobs automatically.
  4. 4. a place where people come to live or the process of settling in such a place.
  5. 5. synonym of "intelligent"
  6. 7. a vehicle used for travel in space.
  7. 10. the act of sending people to live in and govern another country.
  8. 11. a piece of clothing worn by a person who travels in space to protect the body.
  9. 13. the process of finding information, a place, or an object, especially for the first time.
  10. 16. the planet third in order of distance from the Sun.