Mission to Mars

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Across
  1. 2. Without this we would float into space
  2. 5. A planet like this can't support life
  3. 11. A person who travels in space
  4. 12. We use this to travel to Mars
  5. 14. A person who lives on Earth
  6. 16. A robot that explores Mars
  7. 18. Lava comes out of this
Down
  1. 1. A person who lives on Mars
  2. 3. Where we find the Earth, the Sun, the Moon, other galaxies...
  3. 4. Subject + will + ???
  4. 6. If there is none of this, we can't breathe on a planet
  5. 7. The Red Planet
  6. 8. The door of the rocket
  7. 9. Synonym of 'maybe'
  8. 10. What a person wears in space
  9. 13. The name of our group of planets
  10. 15. Subject + ??? + verbal base = expressing a hypothesis
  11. 17. A group of stars and planets