Space stations

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Across
  1. 3. Joining spacecraft together.
  2. 5. Exit for spacewalks.
  3. 7. Chinese space station.
  4. 9. Early Soviet space station.
  5. 10. Astronauts living aboard.
Down
  1. 1. First American space station.
  2. 2. Longlasting Russian space station.
  3. 4. Window with Earth views.
  4. 6. Connects station sections.
  5. 8. International Space Station abbreviation.