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The term "black hole" was used in print by Life and Science News magazines in 1963, and by science journalist Ann Ewing in her article " 'Black Holes' in Space", dated 18 January 1964, which was a report on a meeting of the American Association for the Advancement of Science held in Cleveland, Ohio. [60]
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.
While in a non-rotating black hole the singularity occurs at a single point in the model coordinates, called a "point singularity", in a rotating black hole, also known as a Kerr black hole, the singularity occurs on a ring (a circular line), known as a "ring singularity". Such a singularity may also theoretically become a wormhole. [18]
A 30-year-long question about black holes has finally been resolved. Apparently, black holes twist space time like taffy. This finding is based off a principle put forward by renowned scientist ...
“Making a population of black holes is a very violent process that would send enormous ripples in the surrounding space-time. ... of the more mundane black holes that could explain dark matter ...
(Supermassive black holes up to 21 billion (2.1 × 10 10) M ☉ have been detected, such as NGC 4889.) [16] Unlike stellar mass black holes, supermassive black holes have comparatively low average densities. (Note that a (non-rotating) black hole is a spherical region in space that surrounds the singularity at its center; it is not the ...
He is also a member of the Nuker Team which uses the Hubble Space Telescope to examine supermassive black holes and determined the relationship between a galaxy's central black hole's mass and velocity dispersion. [4] [5] In half a dozen X-ray binary stars, he provided compelling dynamical evidence for a stellar-mass black hole. His robotic ...
Ages ago, in a galaxy some 300 million light years away, an unwitting star veered fatally close to a powerful black hole. After shredding the star apart, the black hole ejected pulses of energy ...