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John A. Wheeler
- And it wasn’t until 1967, 12 years after Einstein’s death in 1955, that these astrophysical singularities became known as “black holes”—a term coined by American physicist John A. Wheeler during a conference in New York to describe the grim fate of a massive star after it runs out of fuel and collapses in on itself.
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Mar 9, 2024 · However, Chiu denied having invented the term black hole and traced its origin to a colloquium he was present in 1960 or 1961, as a postdoc, delivered by Robert Dicke, see Figure 3. At the colloquium, Dicke compared gravitationally completely collapsed stars to the “black hole of Calcutta”.
- Overview
- The Space-Time Theory
- Concept of Black Holes Are Born
Einstein's theory of relativity paved the way for black holes' discovery, but the concept behind their existence was so bizarre that even the scientific visionary was not convinced.
Einstein's General Theory of Relativity
More than a century ago, Albert Einstein stunned the world when he explained the universe through his theory of general relativity. The theory not only described the relationship between space, time, gravity and matter, it opened the door to the theoretical possibility of a particularly mind-boggling phenomenon that would eventually be called black holes.
The concept that explains black holes was so radical, in fact, that Einstein, himself, had strong misgivings. He concluded in a 1939 paper in the Annals of Mathematics that the idea was “not convincing” and the phenomena did not exist “in the real world.”
As described by American physicist John A. Wheeler, general relativity governs the nature of space-time, particularly how it reacts in the presence of matter: “matter tells space-time how to curve, and space-time tells matter how to move.”
Picture a flat rubber sheet (space-time) suspended above the ground. Place a bowling ball in the middle of the sheet (matter) and the sheet will distort around the mass, bending half way to the floor— this is matter telling space-time how to curve. Now roll a marble (matter) around the rubber sheet (space-time) and the marble’s trajectory will change, being deflected by the warped sheet— this is space-time telling matter how to move. Matter and space-time are inextricably linked, with gravity mediating their interaction.
Now, place a singularity—a theoretical point of infinite density—onto the sheet, what would happen to space-time? It was German theoretical physicist Karl Schwarzschild, not Einstein, who used general relativity to describe this hypothetical situation, a situation that would become the most extreme test of general relativity.
Gravitational waves are ripples in the curvature of space-time that propagate as waves traveling outward from their source.
At a certain threshold, Schwarzschild found that the hypothetical singularity would literally punch through space-time. In mathematics, singularities are interesting numerical solutions, but astrophysical singularities were, at the time, thought to be an abomination— there was no known mechanism that could produce them.
Schwarzschild, however, persisted until his death in 1916, realizing that an astrophysical singularity would warp space-time so severely that even light would not be fast enough to get out of the space-time hole that the singularity would create. The point of no return, a spherical region surrounding the singularity, would become known as the “event horizon.”
That was until 1935, when Indian astrophysicist Subrahmanyan Chandrasekhar realized that, should a massive star run out of fuel, the sheer gravitational pressure of that mass would be concentrated to a point, causing space-time to collapse in on itself. Chandrasekhar had bridged the gap between mathematical curiosity and a scientific possibility, seeding the theory behind the formation of a real singularity with extreme consequences for the fabric of space-time.
Even with Chandrasekhar’s contributions toward the modern understanding of the nature of black holes, astrophysical singularities were assumed to be, at best, extremely rare. It stayed that way until the 1960s when British theoretical physicists Stephen Hawking and Roger Penrose proved that, far from being rare, singularities were a part of the cosmic ecosystem, and are a part of the natural evolution of massive stars after they run out of fuel and die.
An artist's rendition of a black hole, which is usually a collapsed star. Nothing can escape its gravitational pull, not even light, which make them utterly dark and practically invisible. In this image, it can only be seen by the surrounding materials being pulled in.
And it wasn’t until 1967, 12 years after Einstein’s death in 1955, that these astrophysical singularities became known as “black holes”—a term coined by American physicist John A. Wheeler during a conference in New York to describe the grim fate of a massive star after it runs out of fuel and collapses in on itself.
The black hole “teaches us that space can be crumpled like a piece of paper into an infinitesimal dot, that time can be extinguished like a blown-out flame, and that the laws of physics that we regard as ‘sacred,’ as immutable, are anything but,” Wheeler wrote in his 1999 autobiography.
Thanks to astronomers and computer scientists working with the Event Horizon Telescope (EHT), a network of eight linked telescopes, humanity was finally able to visualize these "infinitesimal dots." Although Einstein wasn’t alive to see evidence of black holes—the result of real singularities about which he remained doubtful—his theory of relativity made their discovery possible.
- 3 min
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.
May 6, 2015 · Although John Archibald Wheeler is given credit for coining the name black hole in 1967, Bartusiak points out that the term had already been in print journalistically in 1964, in Life...
Jan 21, 2022 · Way back in 1783, the Reverend John Michell, a British scientist, conceived of black holes as “dark stars.” Michell asked what a star would look like if it was so heavy that the velocity needed...
Oct 25, 2020 · Albert Einstein’s General Theory of Relativity, published in 1916, contained the seeds of the modern concept of black holes, although the first ever mention of a similar concept is found in...
Apr 1, 2007 · Bose, Einstein and Statistics. EINSTEIN'S CREATION of quantum statistics was inspired by a letter he received in June 1924 from a then unknown young Indian physicist named Satyendra Nath Bose....
