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

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

    Exactly 141 years ago at high noon, time changed forever in America. In Boston, time moved forward 16 minutes. In Baltimore 6. New Yorkers lost about 4 minutes. Those in Atlanta said goodbye to 22 ...

  3. Effects of time zones on North American broadcasting

    en.wikipedia.org/wiki/Effects_of_time_zones_on...

    An hour of syndicated programming time (between 7:00 and 8:00 p.m. in the Eastern and Pacific time zones) is lost in the Central and Mountain time zones since network primetime in those areas starts at 7:00 p.m., forcing stations in Mountain or Central time (or in parts of both zones) to choose between airing their 6:00 p.m. newscast and ...

  4. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    Time dilation was used in the Doctor Who episodes "World Enough and Time" and "The Doctor Falls", which take place on a spaceship in the vicinity of a black hole. Due to the immense gravitational pull of the black hole and the ship's length (400 miles), time moves faster at one end than the other.

  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. Ergosphere - Wikipedia

    en.wikipedia.org/wiki/Ergosphere

    A black hole with modest angular momentum has an ergosphere with a shape approximated by an oblate spheroid, while faster spins produce a more pumpkin-shaped ergosphere. The equatorial (maximal) radius of an ergosphere is the Schwarzschild radius, the radius of a non-rotating black hole. The polar (minimal) radius is also the polar (minimal ...

  7. Astronomers observe black hole that may have formed gently

    www.aol.com/news/astronomers-observe-black-hole...

    Black holes have previously been spotted orbiting with one other star or one other black ho. The conventional wisdom among astronomers is that black holes - those exceptionally dense objects with ...

  8. 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.

  9. Abolition of time zones - Wikipedia

    en.wikipedia.org/wiki/Abolition_of_time_zones

    Arthur C. Clarke proposed the use of a single time zone in 1976. [2] Attempts to abolish time zones date back half a century [1] and include the Swatch Internet Time. Economics professor Steve Hanke and astrophysics professor Dick Henry at Johns Hopkins University have been proponents of the concept and have integrated it in their Hanke–Henry Permanent Calendar.