A super dense material would be super massive. If it were created in orbit somehow, that wouldn't necessarily be a problem. But if it had to be lifted into orbit, enough mass to create useful gravity would be too expensive to put up there.
I read about one idea involving the use of superstrong electromagnetic currents run through a ship's hull to simulate Earth gravity. Any other ideas? Of course, we could just ask the Minbari...
Wouldn't Starr Jones take a free Space trip? It could be a sweeps week special.
Not to mention a) the impossibility of getting rockets that could push that mass out of Earth orbit; and b) the unfortunate tidal waves, earthquakes, and volcanoes that would result from a supermassive body moving around in low Earth orbit....