Black hole - Wikipedia, the free encyclopedia
A black hole is a region of spacetime from which nothing, not even light, can escape.[1] The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole there is a mathematically defined surface called an event horizon that marks the point of no return. It is called "black" because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics.[2] Quantum mechanics predicts that black holes emit radiation like a black body with a finite temperature. This temperature is inversely proportional to the mass of the black hole, making it difficult to observe this radiation for black holes of stellar mass or greater.
Simulated view of a black hole (center) in front of the Large Magellanic Cloud. Note the gravitational lensing effect, which produces two enlarged but highly distorted views of the Cloud. Across the top, the Milky Way disk appears distorted into an arc.
Simulation of gravitational lensing by a black hole, which distorts the image of a galaxy in the background
Inside Black Holes
This is not an artist's impression.
It is a general relativistic volume-rendering
of a super-computed simulation.
Source: Inside Black Holes
- Journey into the simplest kind of black hole, a black hole with mass, but no charge and no spin — a Schwarzschild black hole.
- Journey into and through a charged black hole — a Reissner-Nordström black hole. This one has a wormhole and a white hole connecting to a new universe.
- How to understand black holes — a black hole is a waterfall of space.
- How does a scene appear when you pass through it at near the speed of light? — The rules of 4-dimensional perspective.
- How to find your way inside black holes — Penrose diagrams.
- Journey into a realistic (well, kind of) black hole — the wormhole is destroyed by the mass inflation instability.
- The movies on this site were made with the Black Hole Flight Simulator.
Source: Inside Black Holes
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