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  2. 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 ...

  3. 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.

  4. Rotating black hole - Wikipedia

    en.wikipedia.org/wiki/Rotating_black_hole

    A rotating black hole is a black hole that possesses angular momentum. In particular, it rotates about one of its axes of symmetry. All celestial objects – planets, stars , galaxies, black holes – spin. [1] [2] [3] The boundaries of a Kerr black hole relevant to astrophysics. Note that there are no physical "surfaces" as such.

  5. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    In Interstellar, a key plot point involves a planet, which is close to a rotating black hole and on the surface of which one hour is equivalent to seven years on Earth due to time dilation. [44] Physicist Kip Thorne collaborated in making the film and explained its scientific concepts in the book The Science of Interstellar. [45] [46]

  6. Schwarzschild metric - Wikipedia

    en.wikipedia.org/wiki/Schwarzschild_metric

    The Schwarzschild solution, taken to be valid for all r > 0, is called a Schwarzschild black hole. It is a perfectly valid solution of the Einstein field equations, although (like other black holes) it has rather bizarre properties. For r < r s the Schwarzschild radial coordinate r becomes timelike and the time coordinate t becomes spacelike. [22]

  7. Gravitational time dilation - Wikipedia

    en.wikipedia.org/wiki/Gravitational_time_dilation

    Gravitational time dilation is a form of time dilation, an actual difference of elapsed time between two events, as measured by observers situated at varying distances from a gravitating mass. The lower the gravitational potential (the closer the clock is to the source of gravitation), the slower time passes, speeding up as the gravitational ...

  8. Why Americans shifted, scrapped minutes and changed time ...

    www.aol.com/why-americans-shifted-scrapped...

    On Nov. 18, 1883, Americans adopted four standardized time zones, replacing a confusing, dangerous hodgepodge of times. Why Americans shifted, scrapped minutes and changed time forever 141 years ...

  9. Outline of black holes - Wikipedia

    en.wikipedia.org/wiki/Outline_of_black_holes

    Stellar black hole – black hole formed by the gravitational collapse of a massive star. [1] They have masses ranging from about three to several tens of solar masses. Intermediate-mass black hole – black hole whose mass is significantly more than stellar black holes yet far less than supermassive black holes.