black hole


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black hole

1. A theoretical object in space, the mass of which is so great and dense that nothing, not even light, can escape its gravitational pull. Black holes have always fascinated me. If even light can't escape them, who knows what they might really contain?
2. Any place, region, or thing in which something (items, people, etc.) are irretrievably lost. My desk is just a black hole of papers and things, and I can never find anything in it! Alzheimer's is a terrible disease, like a black hole in one's mind.
3. A prison cell or area of confinement, especially that which is in notoriously poor or hostile condition. Refers specifically to the so-called "Black Hole of Calcutta," a prison in West Bengal where, in 1756, 146 Europeans were said to have been imprisoned and all but 23 suffocated overnight. Sebastian was sentenced to 30 days of solitary confinement in a tiny black hole, where the only light came from the slot for his food.
See also: black, hole

black hole

1. A wretched prison cell or other place of confinement. For example, The punishment is solitary confinement, known as the black hole. This term acquired its meaning in 1756 with the event known as the Black Hole of Calcutta. On the night of June 20, the ruler of Bengal confined 146 Europeans in a prison space of only 14 by 18 feet. By morning all but 23 of them had suffocated to death. Although historians since have questioned the truth of the story, it survives in this usage.
2. A great void or abyss. For example, Running a single small newspaper ad to launch a major campaign is useless; it amounts to throwing our money into a black hole . This usage alludes to a region, so named by astronomers, whose gravitational field is so intense that no electromagnetic radiation can escape from it. [Late 1970s]
See also: black, hole
References in periodicals archive ?
Instead, the black hole tears material away from the closer side of the star.
This means that the higher mass galaxy has a higher mass black hole.
The new discovery means that black holes can be created on their own and are probably quite common.
If a black hole spins slowly enough, it won't repel its meal as much.
She added that NuSTAR has a capability of observing events like the corona in the black hole that can help them study the light-bending effects of general relativity.
Researchers estimated the mass of the black hole by studying the motion of cool gas near the center of the galaxy using visible light data from the Clay Telescope.
The lead author of the study and an assistant professor of physics and astronomy at the University of Utah, Anil Seth, said that they didn't know of any way that an object this small could have a black hole so big.
The black hole has a density inside its outer event horizon that is inversely proportional to the square of the (reduced) distance from the origin.
The researchers found evidence that something other than a doughnut structure may, in some circumstances, determine whether a black hole is visible or hidden.
While astronomers have long been able to measure black hole masses very effectively, determining their spins has been much more difficult.
Lead researcher Professor Chris Done, in the department of physics, said: "We know the black hole in the centre of each galaxy is linked to the galaxy as a whole, which is strange because black holes are tiny in relation to the size of a EXPERTS from our region have made a discovery about 'supermassive' black holes which could lead to a better understanding of how they help galaxies grow.
This distance depends on black hole spin, as a fast spinning black hole pulls the disc in closer to itself, the researchers said.
In research reported in the latest issue of the science journal Nature, researchers have concluded that a "monstrous" (or "super-super massive," choose your adjective) black hole exists in a galaxy named NGC 1277 in the constellation Perseus, 250 million light years from Earth.
This is just one way a black hole can be a source of enormous energy.
Could our universe be located within the interior of a wormhole which itself is part of a black hole that lies within a much larger universe?
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