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  2. Black hole - Wikipedia

    en.wikipedia.org/wiki/Black_hole

    A black hole is a region of spacetime wherein gravity is so strong that no matter or electromagnetic energy (e.g. light) can escape it. [2] Albert Einstein's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. [3] [4] The boundary of no escape is called the event horizon.

  3. Black hole information paradox - Wikipedia

    en.wikipedia.org/wiki/Black_hole_information_paradox

    The first image (silhouette or shadow) of a black hole, taken of the supermassive black hole in M87 with the Event Horizon Telescope, released in April 2019. The black hole information paradox [1] is a paradox that appears when the predictions of quantum mechanics and general relativity are combined.

  4. Outline of black holes - Wikipedia

    en.wikipedia.org/wiki/Outline_of_black_holes

    Extremal black hole – black hole with the minimal possible mass that can be compatible with a given charge and angular momentum. Black hole electron – if there were a black hole with the same mass and charge as an electron, it would share many of the properties of the electron including the magnetic moment and Compton wavelength.

  5. General relativity - Wikipedia

    en.wikipedia.org/wiki/General_relativity

    Slow motion computer simulation of the black hole binary system GW150914 as seen by a nearby observer, during 0.33 s of its final inspiral, merge, and ringdown.The star field behind the black holes is being heavily distorted and appears to rotate and move, due to extreme gravitational lensing, as spacetime itself is distorted and dragged around by the rotating black holes.

  6. Kruskal–Szekeres coordinates - Wikipedia

    en.wikipedia.org/wiki/Kruskal–Szekeres_coordinates

    The black hole event horizon bordering exterior region I would coincide with a Schwarzschild t-coordinate of + while the white hole event horizon bordering this region would coincide with a Schwarzschild t-coordinate of , reflecting the fact that in Schwarzschild coordinates an infalling particle takes an infinite coordinate time to reach the ...

  7. Stephen Hawking may have cracked massive mystery of black holes

    www.aol.com/news/2015-08-26-stephen-hawking-may...

    Stephen Hawking provided a ground-breaking solution to one of the most mysterious aspects of black holes, called the "information paradox."Black holes look like they 'absorb' matter.

  8. Schwarzschild radius - Wikipedia

    en.wikipedia.org/wiki/Schwarzschild_radius

    Neither light nor particles can escape through this surface from the region inside, hence the name "black hole". Black holes can be classified based on their Schwarzschild radius, or equivalently, by their density, where density is defined as mass of a black hole divided by the volume of its Schwarzschild sphere.

  9. Stephen Hawking's famous prediction about black holes was ...

    www.aol.com/article/2016/08/15/stephen-hawking-s...

    Acoustic black hole. To test this prediction, ... Steinhauer explained to Business Insider. If the river is flowing faster than you can swim, then you can't move forward you go back. That's like ...