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  2. Event horizon - Wikipedia

    en.wikipedia.org/wiki/Event_horizon

    For black holes, this manifests as Hawking radiation, and the larger question of how the black hole possesses a temperature is part of the topic of black hole thermodynamics. For accelerating particles, this manifests as the Unruh effect, which causes space around the particle to appear to be filled with matter and radiation.

  3. Black holes in fiction - Wikipedia

    en.wikipedia.org/wiki/Black_holes_in_fiction

    [3] [28] John Varley's 1978 short story "The Black Hole Passes" depicts an outpost in the Oort cloud being imperilled by a small black hole. [3] [10] [29] In Stephen Baxter's 1993 short story "Pilot", a spaceship extracts energy from a rotating black hole's ergosphere to widen its event horizon and cause a pursuer to fall into it.

  4. Apparent horizon - Wikipedia

    en.wikipedia.org/wiki/Apparent_horizon

    Within an apparent horizon, light does not move outward; this is in contrast with the event horizon. In a dynamical spacetime, there can be outgoing light rays exterior to an apparent horizon (but still interior to the event horizon). An apparent horizon is a local notion of the boundary of a black hole, whereas an event horizon is a global notion.

  5. Black hole - Wikipedia

    en.wikipedia.org/wiki/Black_hole

    A black hole with the mass of a car would have a diameter of about 10 −24 m and take a nanosecond to evaporate, during which time it would briefly have a luminosity of more than 200 times that of the Sun. Lower-mass black holes are expected to evaporate even faster; for example, a black hole of mass 1 TeV/c 2 would take less than 10 −88 ...

  6. Trapped surface - Wikipedia

    en.wikipedia.org/wiki/Trapped_surface

    Closed trapped surfaces are a concept used in black hole solutions of general relativity [1] which describe the inner region of an event horizon. Roger Penrose defined the notion of closed trapped surfaces in 1965. [2] A trapped surface is one where light is not moving away from the black hole.

  7. List of most massive black holes - Wikipedia

    en.wikipedia.org/wiki/List_of_most_massive_black...

    The supermassive black hole at the core of Messier 87, here shown by an image by the Event Horizon Telescope, is among the black holes in this list. This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses (M ☉), approximately 2 × 10 30 kilograms.

  8. Kevin Costner’s Two-Part Western Epic ‘Horizon’ Lands 2024 ...

    www.aol.com/kevin-costner-two-part-western...

    Kevin Costner’s two-part Western epic “Horizon: An American Saga” is coming to theaters next summer. “Chapter 1” will be released on June 28, 2024, and “Chapter 2” will land on Aug ...

  9. Outline of black holes - Wikipedia

    en.wikipedia.org/wiki/Outline_of_black_holes

    Extremal black holeblack 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.