Space exploration

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Across
  1. 4. An object that orbits a planet or other celestial body
  2. 6. An artificial satellite designed to support a human crew in orbit around the Earth
  3. 7. A vehicle used for space travel
  4. 10. The force that attracts a body toward the center of the earth or another celestial body
  5. 11. A vehicle designed for spaceflight
  6. 12. A person trained to travel in space
Down
  1. 1. A space telescope that has revolutionized astronomy
  2. 2. The act of an aircraft or spacecraft touching down on a surface
  3. 3. A Soviet or Russian astronaut
  4. 5. A vehicle designed to explore the surface of a planet or other celestial body
  5. 8. A planned operation that is undertaken to achieve a particular aim
  6. 9. What is seen beyond the sky