Astronauts and Space Travel

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Across
  1. 2. / The force that keeps planets and people on the ground.
  2. 5. / A craft designed for space travel.
  3. 7. / A person trained to travel and work in space.
  4. 9. / The natural satellite of Earth visited by astronauts.
Down
  1. 1. / When an astronaut works outside their spacecraft.
  2. 3. / The U.S. space agency responsible for space exploration.
  3. 4. / The path one object takes around another in space.
  4. 5. / The first artificial satellite sent into space.
  5. 6. / The act of sending a rocket into space.
  6. 8. / A vehicle used to launch people or objects into space.