non singular black hole

A homogeneous, spherical cloud of cosmic dust begins to contract under its own gravity. At some point, by classical laws, it should collapse into a point of infinite density — a singularity.

An old house. The facade is freshly painted, the stairs don't creak. A pretty picture. But try to move in heavy furniture, and the floorboards give way. The beauty of the facade says nothing about the strength of the floors. It's much the same with black holes without singularities.

Light freezes at the edge of the abyss: that's what the event horizon of an ordinary black hole looks like. But at the center of this abyss lurks a singularity, a point where the laws of physics break down. What if, instead of a point, there were a hard shell? A gravastar is not a black hole.

A campfire burns steadily and long. But when the wind blows, the flame flickers out, leaving only embers. A similar story plays out with the gravastar — a hypothetical object that was supposed to replace the black hole. An ordinary black hole hides a singularity — a point where the laws of physics break down.

An ordinary black hole hides a singularity at its center — a point where density and curvature become infinite and the laws of physics break down. The authors of the new work built a model of a rotating black hole that, instead of a singularity, contains a calm "core" resembling ordinary flat space.

At the center of a classical black hole lurks a singularity — a point where the density and curvature of spacetime become infinite. Physics goes silent there.

In classical theory, a black hole is where matter collapses to a point of infinite density. Such a 'singularity' looks like an error in the equations: nature hardly tolerates infinities. Many physicists seek ways to 'smooth out' this flaw, and one idea is to modify the theory of gravity itself at small distances.

At the center of an ordinary black hole, according to classical ideas, lurks a singularity — a point of infinite density where the laws of physics break down. But some theories, inspired by the duality idea from string theory, propose replacing the point with a tiny 'smudged' region.

When a giant star runs out of fuel, it collapses into a black hole. Such a hole has an outer boundary — the event horizon, beyond which even light cannot escape. But many black holes also have an inner boundary — a second horizon that separates the outer layers from the singularity core.

A black hole's interior is layered like an onion. In the new model, instead of an infinite point at the center, there are three regions: a dense core, a transition layer, and a crust just below the horizon. All arise from a single field that interacts with itself.

In quantum field theory, there is a strict law: a signal cannot outrun light. This is causality — the foundation on which the order of events rests. But near black holes, this foundation begins to crack, especially if the hole is not quite ordinary.

A star contracts under its own gravity, and at some point its fate hangs on a razor-thin balance. Classical physics paints a grim picture: if the mass and the force of compression are tuned with terrifying precision, what emerges is not a black hole but a 'naked' singularity.

Space is like a sheet of paper: gravity bends it, making lines converge toward the center. But if you bend too hard, the paper tears, just as space, under monstrous curvature, doesn't collapse into a point but forms a torn edge. That edge is the quantum boundary.

You toss pebbles into a whirlpool, trying to spin it faster and peer into its depths. A black hole is a cosmic whirlpool, where instead of water there is curved spacetime, and instead of a bottom there is a singularity — a point where the familiar laws of physics break down.

In the standard picture, black holes are the undisputed density champions: all their matter is squeezed into a single point. Imagine the entire mass of Mount Everest packed into a grain of salt. But physicists have found a theoretical trick.

A dying star is not just fading away. In its final moments, the core, starved of fuel, collapses into itself at colossal speed. Classical gravity leaves no choice: if the mass is large enough, a black hole is born — a region from which not even light can escape.

In 1965, Penrose unleashed a mathematical thunderbolt on physics: any sufficiently massive star, shrinking under its own weight, inevitably collapses into a singularity — a region where spacetime curvature becomes infinite and the laws of physics break down.

Every isolated quantum system inevitably moves toward thermal equilibrium — a state where all details of the past are erased. It’s like an orchestra: instead of a symphony, it starts playing white noise — random but statistically predictable notes.

A star that has exhausted its fuel falls into itself. Its outer layers fly apart, while the core compresses to unimaginable densities. It was once thought that this process ends in a point — a singularity where the laws of physics break down. New work shows that just before the very end, something strange happens inside the future black hole.

A pencil dropped on the floor hits with its entire surface at once. But if the floor were quantum, made of countless vibrating grains of sand, the pencil would never touch a single point.

A magnet with only one pole (north, without a south) is not a fragment but a particle in its own right. Physicists call it a magnetic monopole (a carrier of a single magnetic charge). Such visitors could have been born in the early universe, when the forces were just separating.

Black holes ring like colossal bells. Colliding or devouring matter, they oscillate and send ripples through the cosmos — gravitational waves. These are tremors of the very fabric of spacetime, and their tone reveals the hole's inner structure.

When liquid is swirled in a cup, a vortex with an empty center forms. In this empty core, waves find a trap: bouncing off the walls, they siphon energy from the vortex and grow like a flame along a fuse — each wave stronger than the last, until a surge breaks loose. Astrophysicists have described the same chain reaction around black holes.