Asteroid Belt

Asteroid belts are found in nearly every system, but the more valuable ones are much rarer. They are full of Asteroids, and have a galactic law that prevents the extraction of huge amounts of minerals. If someone exceeds the threshold of mining, they will be asked politely to leave. Otherwise, security forces will force them to leave. Often times, miners are found grazing asteroid belts, looking for materials. Where there are miners, there are pirates. Local Security forces are also sometimes found, looking for illegal activity. It is also common to find sorts of Bounty Hunters roaming the place.

In short, Asteroid belts are places of activity.