Q What are the seven wonders of the world?

In the show it is first revealed that the station mysteriously disappeared just after construction was completed. The officer in charge, Major Lewis Krantz, sent out a distress signal. (Krantz was an EarthForce Marine, not intended to be part of the station's permanent crew; he was assigned to supervise the final stages of construction, then to turn it over to an EarthForce Naval officer who would be the permanent CO.)