Contrary to many people’s fears, the gravitational pull of the Pit has had little effect on the Hammer’s Star system, since it’s more than a hundred billion kilometers away.
Millions of years ago, the black hole passed near enough to the Hammer’s Star system to capture its star in a long, elliptical orbit. Back then, the black hole would have been a brilliant thing to see, flashing with explosions of light and energy as it consumed the occasional comet and rogue asteroid from the outer parts of the system.
Today, the Pit is almost always invisible. Occasionally, it demonstrates its power when it pulls in some stellar debris, and once every few months its gravity disturbs comets in Hammer’s Star’s Oort cloud, sending them spiraling off into interstellar space or into the heart of the system. For the most part, though, the Pit is ignored by humanity.