Space Exploration

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Across
  1. 4. To understand something completely
  2. 7. The quality of being able to continue over a period of time
  3. 9. A person who has been trained for travelling in space
  4. 10. To make something less harmful, unpleasant, or bad
Down
  1. 1. If a situation is bleak, there is little or no hope for the future
  2. 2. The universe considered as a system with an order and pattern
  3. 3. One of the major inner satellites of Sat
  4. 5. The suitability of an environment for life
  5. 6. One of many large rocks that circle the sun
  6. 8. A situation in which there is no fairness and justice