NASA - National Aeronautics and Space Administration

This is a close-up view of a docking port on the International Space Station. Image Credit: NASA

      an area where one space vehicle joins with another

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Sentences:
The space station and shuttle have docking ports so they can connect to each other.

Astronauts practice joining the docking ports by using a tool that works like a video game.

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More Information:
http://ard.msfc.nasa.gov/images/pages/stationCEV.jpg   →
http://quest.nasa.gov/smore/photos/images/docking.jpg   →
http://history.nasa.gov/SP-4208/p296.jpg   →