All navigators know to plot their orbits far from Galrix’s Folly. 

The Imperator after whom it was named had an enthusiasm for territorial control that bordered on the feudal. Regrettably he was trained in a gravity well, for dropship landings and planetary conquest, and as such, his understanding of three-dimensional strategy was rudimentary at best.

So he built a castle among the stars, crammed it with as many auto-targeted energy weapons as he could source, and declared everything within its orbit his fiefdom.

He could not comprehend that - without an armada to patrol the space - his new territory consisted merely of a thin, easily-avoidable torus, not the significantly larger portion of the system it carved out.

Imperator Galrix is long dead now, but still his Folly rampages on.