The USS Atlantis is en route to Maris V---the edge of the known galaxy.  Their mission:

1. Rendezvous with the ship's new first officer and command personnel.

2. Uncover the truth about the mysterious Jutterdon Station, a starbase facility built by the inhabitants of Maris V, a starbase of unparalleled size and complexity.

And the success of their first mission together may well determine the course of human exploration across the galaxy for centuries to come...

Stargate Atlantis/Star Trek the Next Generation X-over fanfic