Mars: The Red Planet

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Across
  1. 2. The process of uncovering new knowledge.
  2. 7. The thin layer of gases enveloping a planet.
  3. 9. The driving force behind space exploration.
  4. 11. The act of venturing into the unknown.
  5. 12. Hazardous energy that challenges human survival.
  6. 14. The path a planet follows around a star.
  7. 15. Robotic explorer that traverses alien terrain.
  8. 16. The concept of modifying a planet to support life.
  9. 17. Deep chasm carved by ancient forces.
  10. 19. Study of a planet’s physical structure and history.
  11. 20. Dominant hue that gives the planet its name.
Down
  1. 1. Originating from beyond Earth.
  2. 3. The establishment of human settlements.
  3. 4. Towering geological feature found on the planet.
  4. 5. The edge of human exploration and possibility.
  5. 6. Evidence that may indicate the presence of life.
  6. 8. A structure designed for human living in space.
  7. 10. New ideas and technologies spurred by exploration.
  8. 13. Historical misinterpretation of surface features.
  9. 18. Compound responsible for the planet’s distinctive color.