Space

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Across
  1. 1. The private aerospace manufacturer aiming to reduce space transportation costs.
  2. 3. A long and often difficult process of personal or physical travel.
  3. 5. The emission of energy as electromagnetic waves which can be harmful to DNA.
  4. 9. (2 words) A large artificial satellite used as a long-term base for observatory work.
Down
  1. 2. The action of traveling in or through an unfamiliar area in order to learn about it
  2. 4. The gravitationally curved trajectory of an object.
  3. 6. A person who is trained to travel in a spacecraft.
  4. 7. The accidental transfer of microbes between two planetary biomes.
  5. 8. A cylindrical projectile that can be propelled to a great height or distance.