Earth could orbit a Sun-mass black hole much as it orbits the Sun.

Why a black hole is not a cosmic vacuum cleaner

From far away, a black hole’s gravity follows the same basic rule as any other object’s: it depends on its mass and your distance from it. If the Sun were replaced by a black hole with exactly the same mass, Earth would still feel essentially the same gravitational pull and would remain in roughly the same orbit. The change would be catastrophic for sunlight and warmth, not because Earth had suddenly been dragged inward.

Gravity does not reach out and pull harder simply because an object is called a black hole. What makes one unusual is how much mass is squeezed into such a small region. Near that compact mass, a modest change in distance can bring you into an extraordinarily strong gravitational field.

The point where escape stops

An event horizon is the boundary around a black hole beyond which no path leads back out—not even a path taken by light. It is not a solid surface or a drain. Rather, it marks a limit set by gravity: once something crosses it, every possible route forward leads deeper inward.

Farther out, an object can still orbit a black hole, just as it can orbit a star, provided its motion and distance allow a stable orbit. To fall in, it must lose enough orbital energy—through interactions with other matter, for example—to spiral closer. A black hole can therefore capture material, but it does not automatically suck in everything around it.

Why compactness changes the danger

The Sun and a same-mass black hole would have the same gravitational influence on Earth at Earth’s distance. But the black hole’s mass would occupy a dramatically smaller space, bringing the event horizon and the most extreme conditions much closer to the center. An approaching object could encounter intense tidal forces: gravity pulls more strongly on the nearer side of the object than on the farther side, stretching it apart.

So the memorable distinction is not that black holes have a special long-range suction. It is that their mass is concentrated tightly enough to create a boundary from which escape is impossible.