black holes can have massive grav feilds orion.
The event horizon is just where nothing can escape from.
The one in the center of our galaxy is billions of times heavier than our Sun, and in addition to the massive old stars orbiting it, it's slowly pulling the galaxy in. But don't worry, it'll take TRILLIONS of years.
By that time, we'll have collided with other galaxys etc., so who knows what will happen?