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British astronomer (1915–2001)
The son of a textile merchant from Bingley in Yorkshire, England, Hoyle was educated at Cambridge. After graduating in 1936 he remained at Cambridge as a graduate student before being elected to a fellowship at St. John's College in 1939. Hoyle spent World War II working on the development of radar at the Admiralty. After the war he returned to Cambridge and was appointed Plumian Professor of Astronomy in 1958.
Hoyle first came to prominence in 1948 with his formulation of the ‘steady-state theory’ of the universe. He was aware that cosmology at the time was inadequate in that it required a smaller age for the universe than geologists had attributed to the Earth. Hoyle's ideas about the steady-state theory were provoked one night in 1946, when he went to see a ghost film with Hermann Bondi (1919–2005) and Thomas Gold. The film was in four parts but linked the sections together to create a circular plot in which the end of the film became its beginning. Hoyle later noted that it showed him that unchanging situations need not be static. The universe could perhaps be both unchanging and dynamic.
Hoyle worked out some of the detailed implications of this view in his 1948 paper A New Model for the Expanding Universe. Matter, he argued, was created continually. It arose from a field generated by the matter that already exists – that is, in the manner of the film, “Matter chases its own tail.” Created matter is spread throughout the whole of space and, according to the theory, is being produced at a rate of about one atom per year in a volume equal to that of a large building. It is this creation that drives the expansion of the universe. Matter is distributed evenly through space and therefore new clusters of galaxies are forming as other galaxies are receding into the distance.
Although Hoyle's work was initially treated sympathetically, the steady-state theory failed to cope with new evidence emerging in the 1960s from radio astronomy. Counts of radio sources by Martin Ryle in the 1960s and, in particular, the discovery by Robert Wilson and Arno Penzias of the cosmic background radiation in 1964, convinced most scientists that the universe had begun with a big bang. Hoyle defended his theory strongly, objecting to the accuracy of the radio counts by arguing that they were so constructed as to allow every error to count against the theory. “Properly analyzed,” Hoyle wrote in 1980, “the disproof of the theory claimed in the 1950s and early 1960s fails completely.” He has also suggested that there could be alternative explanations for the background radiation.
Hoyle subsequently felt that he was not committed to the details of any cosmological orthodoxy, such as either the big bang or the steady-state theory of 1948. He spent much time exploring the implications of both theories and, in collaboration with Jayant Narlikar, developing a new theory of gravity. In 1964 they proposed, following some early arguments of Ernst Mach, that the inertia of any piece of matter derives from the rest of the matter in the universe. They also predicted that the gravitational constant changes over time.
Hoyle also worked in the 1950s on the formation of the elements. It was widely believed that carbon could be formed, along with many other elements, in the interior of stars. One reaction proposed required three helium nuclei to fuse into a carbon atom as in:
4He + 4He + 4He → 12CHoyle realized that the reaction would take place too infrequently to account for the abundance of carbon in the universe. Another possibility was a two-stage reaction:
4He + 4He → 8Be
8Be + 4He → 12C
| Biography: Fred Hoyle |
British astronomer and cosmologist Sir Fred Hoyle (born 1915) is best known as the champion of the steady-state theory of the nature of the universe. He also has made significant contributions to the study of stellar evolution and has published more than 40 books, including science fiction.
Fred Hoyle was born in Bingley, Yorkshire, England, on June 24, 1915. His fascination with mathematics and astronomy was evident at an early age. He taught himself the multiplication tables before he was six and would often stay up all night looking through a telescope he received as a gift.
Hoyle was educated at Emmanuel College and St. John's College, Cambridge. He spent six years during World War II with the British Admiralty working on radar development. In 1945, he returned to Cambridge as a lecturer in mathematics. Three years later, in collaboration with the astronomer Thomas Gold and the mathematician Hermann Bondi, he announced refinements to the steady-state theory first put forward by Sir James Jeans in about 1920. Within the framework of Albert Einstein's theory of relativity, Hoyle formulated a mathematical basis for the steady state theory, making the expansion of the universe and the creation of matter interdependent.
Bondi, Gold, and Hoyle found the idea of a sudden beginning to the universe-the so-called big bang theory-philosophically unsatisfactory. They devised a model derived from an extension of the "cosmological principle" that had been used for previous theories. It stated that the universe appeared the same from any location, but not necessarily for all times. They proposed that the decrease in the density of the universe caused by its expansion is exactly balanced by the continuous creation of matter condensing into galaxies that take the place of the galaxies that have receded from the Milky Way, thereby maintaining forever the present appearance of the universe.
Controversy Over Steady-State Theory
In the late 1950s and early 1960s, controversy over the steady state theory grew. New observations of distant galaxies and other phenomena, supporting the big bang theory, weakened the steady state theory, and it has since fallen out of favor with most cosmologists. Although Hoyle was forced to alter some of his conclusions, he attempted to make his theory consistent with new evidence.
Hoyle was elected to the Royal Society in 1957, a year after joining the staff of the Hale Observatories (now the Mount Wilson and Palomar observatories). In collaboration with William Fowler and others in the United States, he formulated theories about the origins of stars as well as about the origins of elements within stars. He directed the Institute of Theoretical Astronomy at Cambridge (1967-73), an institution he was instrumental in founding. Hoyle received a knighthood in 1972.
In 1976, Hoyle and Chandra Wickramasinghe, a fellow professor at the University of Cardiff with whom Hoyle often collaborated, speculated that microorganisms or biochemical compounds from outer space are responsible for originating life on Earth and possibly other parts of the universe.
In 1981, the two coauthored Diseases from Space in which they hypothesized that viruses and bacteria fall into the atmosphere after being incubated in the interiors of comet heads, and that people become ill by breathing this infected air. They supported their theory by stating that the spread of disease is frequently far too rapid to be attributable solely to person-to-person contact. Their theory, known as panspermia, was widely derided.
AIDS From Outer Space?
In December 1988, Hoyle wrote to the Daily Telegraph of London explaining his theory that AIDS originated in outer space. It was immediately dismissed by most British AIDS experts. Many viewed the theory as proof that Hoyle had overstepped the limits of acceptable scientific eccentricity. His letter claimed that viruses from outer space are also responsible for many other epidemics in Britain, including Legionnaires' disease and meningitis. "A small comet disintegrating low in the atmosphere could lead to pathogens being brought down in rainstorms that are geographically localized, " Hoyle claimed. "The comets responsible for new diseases such as AIDS are admittedly rare objects, but the sudden injection into the human population of at least three disjoint viruses point decisively to an input that is external to the Earth, " Hoyle wrote. "We think it most likely in each instance primary entry was secured through infected rainwater entering lesions in feet in the mainly barefoot populations of the Third World with subsequent transmissions proceeding through human contact. Hoyle urged that a major international effort was needed to carry out "a rigorous and continuous microbiological surveillance of rainwater and of groundwater on a worldwide scale. The survival of our species may well be contingent upon this." His ideas were largely viewed as fantasy by other scientists.
In 1996, however, the National Aeronautics and Space Administration (NASA) announced that a small asteroid it had been studying possibly contained fossil remains of primitive life. This finding rekindled speculation about the extraterrestrial "seeding" of life on Earth. Other recent discoveries in astronomy, biology, and chemistry have tended to support the idea first proposed by Hoyle and Wickramasinghe some 20 years earlier. Other scientists, however, remain skeptical. Under closer scrutiny, the evidence turned out to be ragweed pollen and furnace ash. If NASA's microfossils really are the remnants of past life on Mars, then the implications for life and how it got started are profound. The first thing that would have to be explained is why ancient microorganisms on Earth and on Mars are apparently so similar. Some scientists, such as Ian Crawford of University College London, believe that the resemblance may be only superficial.
An Iconoclast
Hoyle has published numerous books challenging many of the basic tenets of modern cosmology. In his 1951 book, The Nature of the Universe, Hoyle rejects the longstanding big bang theory of the origin of the universe in favor of the steady state theory. He expounds further upon the steady state and other theories in The Intelligent Universe: A New View of Creation and Evolution, published in 1977. In it, he dismisses one piece of orthodox science after another, replacing each with ingenious alternatives. He also presents an argument against Darwin's theory of evolution, claiming that "living organisms are too complex to have been produced by chance." Hoyle suggests, instead, that "we owe our existence to another intelligence which created a structure for life as part of a deliberate plan." In describing the attributes of an intelligence superior to ourselves, Hoyle admits that we may have to use the word forbidden in science, "God." He said he found his atheism greatly shaken after calculating the chance that carbon, "uniquely designed to make life possible, " would have precisely the required resonance to permit it to form in sufficient abundance in the universe. "A common sense interpretation of the facts suggests that a super intellect has monkeyed with physics, as well as with chemistry and biology, and that there are no blind forces worth speaking about in nature. The numbers one calculates from the facts seem to me so overwhelming as to put this conclusion almost beyond question." His scientific works for a lay audience include Highlights in Astronomy (1975). He has also written science-fiction, including The Black Cloud (1957), and an autobiography, The Small World of Fred Hoyle (1986).
Hoyle and Wickramasinghe were among the first to argue against the theory that life on Earth originated in a so-called "prebiotic soup." The theory is based on a famous experiment by Stanley Miller in 1953. Deciding to test an earlier hypothesis by Alexander Oparin and John Haldane, Miller started with a sealed mixture of gases thought to be constituents of the primitive Earth's atmosphere. The gases-water vapor, hydrogen, ammonia, and methane-were subjected to an electric discharge, simulating lightning, and the products were found to contain certain amino acids that are building blocks of proteins. This experiment led to the theory that living organisms originated from a prebiotic soup formed in the above manner. This theory soon became the textbook model to describe the origins of life. Hoyle and Wickramasinghe pointed out that the primitive Earth could not have had the hydrogen-rich atmosphere postulated for a prebiotic soup.
Science Fiction
Hoyle has remained controversial. In 1981, he and others made the erroneous claim that a famous Archaeopteryx fossil in the British Museum was a fake. In 1990, he coauthored a theory linking influenza pandemics and sunspot outbreaks. While noting that Hoyle's theses are sometimes far-fetched, reviewers often express their admiration for the author's writing style, statistical data, and its richness in classical quotations. Hoyle has also authored over a dozen science fiction novels, more than half of which have been co-written with his son, Geoffrey Hoyle. Several critics suggest that Hoyle's highly technical and scientific background enhances the credibility and appeal of his novels.
Among the numerous awards and distinctions bestowed on him are the UN Kalinga Prize, the Royal Medal of the Royal Society, and the Gold Medal of the Royal Astronomical Society. In 1997, he was awarded the highly prestigious Crafoord Prize by the Swedish Academy in recognition of outstanding basic research in fields not covered by the Nobel Prize. Hoyle is a Fellow of the Royal Society and a Foreign Associate of the US National Academy of Sciences. He has published over 40 books, including technical science, popular science, and science fiction. Hoyle is an Honorary Fellow of both Emmanuel College and St. John's College Cambridge and an Honorary Professor of Cardiff University in Wales.
Further Reading
Contemporary Authors, Volume 55, Gale, 1991, p. 234-237.
Alberta Report, September 23, 1977, p. 35.
Chicago Tribune, September 4, 1985; December 18, 1986.
Independant, September 18, 1997, p. 3.
Reuters, August 7, 1996.
Scientific American, August, 1996.
The World and I, September 1, 1997, p. 218.
"Sir Fred Hoyle Homepage, " Cardiff University, http://www.cf.ac.uk/uwcc/maths/wickramasinghe/hoyle.html (April 1998).
| Columbia Encyclopedia: Sir Fred Hoyle |
Bibliography
See S. Mitton, Conflict in the Cosmos: Fred Hoyle's Life in Science (2005).
| Quotes By: Sir Fred Hoyle |
Quotes:
"Space isn't remote at all. It's only an hour's drive away if your car could go straight upwards."
| Wikipedia: Fred Hoyle |
| Sir Fred Hoyle | |
|---|---|
| Born | 24 June 1915 Gilstead, Bingley, West Yorkshire, England |
| Died | 20 August 2001 (aged 86) Bournemouth, England |
| Residence | United Kingdom |
| Nationality | British |
| Fields | Astronomy |
| Institutions | Institute of Astronomy, Cambridge |
| Alma mater | Emmanuel College, Cambridge |
| Academic advisors | Rudolf Peierls Maurice Pryce Philip Worsley Wood |
| Doctoral students | John Moffat Chandra Wickramasinghe Cyril Domb Jayant Narlikar |
| Other notable students | Paul C. W. Davies |
| Known for | Coining the phrase 'Big Bang' Hoyle's fallacy Hoyle-Narlikar theory Steady state theory Triple-alpha process Panspermia |
| Influenced | Jocelyn Bell Burnell |
| Notable awards | Mayhew Prize (1936) Smith's Prize (1938) RAS Gold Medal (1968) Bruce Medal (1970) Royal Medal (1974) Klumpke-Roberts Award (1977) Crafoord Prize (1997) |
| Religious stance | Atheist turned Agnostic Deist |
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Notes
He is the father of Geoffrey Hoyle and Elizabeth Butler. |
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Sir Fred Hoyle FRS (24 June 1915 – 20 August 2001) was an English astronomer noted primarily for his contribution to the theory of stellar nucleosynthesis and his often controversial stance on other cosmological and scientific matters—in particular his rejection of the "Big Bang" theory, a term originally coined by him as a jocular, perhaps disparaging, name for the theory which was the main rival to his own. In addition to his work as an astronomer, Hoyle was a writer of science fiction, including a number of books co-written with his son Geoffrey Hoyle. Hoyle spent most of his working life at the Institute of Astronomy at Cambridge and served as its director for a number of years. He died in Bournemouth, England, after a series of strokes.
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Hoyle was born in Gilstead, West Yorkshire, England,[1] near Bradford, where his father, George Hoyle, worked in the wool trade. His mother, Mabel Pickard, had studied music at the Royal College of Music in London. Hoyle was educated at Bingley Grammar School and read mathematics at Emmanuel College, Cambridge.[2]
An early paper of Hoyle's made an interesting use of the anthropic principle. In trying to work out the routes of stellar nucleosynthesis, he observed that one particular nuclear reaction, the triple-alpha process, which generates carbon, would require the carbon nucleus to have a very specific energy for it to work. The large amount of carbon in the universe, which makes it possible for carbon-based life-forms (e.g. humans) to exist, demonstrated that this nuclear reaction must work. Based on this notion, he made a prediction of the energy levels in the carbon nucleus that was later borne out by experiment.
However, those energy levels, while needed in order to produce carbon in large quantities, were statistically very unlikely. Hoyle later wrote:
Would you not say to yourself, "Some super-calculating intellect must have designed the properties of the carbon atom, otherwise the chance of my finding such an atom through the blind forces of nature would be utterly minuscule." Of course you would . . . A common sense interpretation of the facts suggests that a superintellect has monkeyed with physics, as well as with chemistry and biology, and that there are no blind forces worth speaking about in nature. The numbers one calculates from the facts seem to me so overwhelming as to put this conclusion almost beyond question.[3]
Hoyle, an atheist until that time, said that this suggestion of a guiding hand left him "greatly shaken." Consequently, he began to believe in a god and panspermia.[4] Those who advocate the intelligent design hypothesis sometimes cite Hoyle's work in this area to support the claim that the universe was fine tuned in order to allow intelligent life to be possible. Some of his thoughts in this area have been referred to as "Hoyle's fallacy" by detractors.
His co-worker William Alfred Fowler eventually won the Nobel Prize for Physics in 1983 (with Subrahmanyan Chandrasekhar), but for some reason Hoyle’s original contribution was overlooked, and many were surprised that such a notable astronomer missed out. Fowler himself in an autobiographical sketch affirmed Hoyle’s pioneering efforts:
The concept of nucleosynthesis in stars was first established by Hoyle in 1946. This provided a way to explain the existence of elements heavier than helium in the universe, basically by showing that critical elements such as carbon could be generated in stars and then incorporated in other stars and planets when that star "dies". The new stars formed now start off with these heavier elements and even heavier elements are formed from them. Hoyle theorized that other rarer elements could be explained by supernovas, the giant explosions which occasionally occur throughout the universe, whose temperatures and pressures would be required to create such elements.
While having no argument with the Lemaître theory, (later confirmed by Edwin Hubble's observations) that the universe was expanding, Hoyle disagreed on its interpretation. He found the idea that the universe had a beginning to be philosophically troubling, as many argued that a beginning implies a cause, and thus a creator (see Kalam cosmological argument).[5] Instead, Hoyle, along with Thomas Gold and Hermann Bondi (with whom he had worked on radar in World War II), argued for the universe as being in a "steady state". The theory tried to explain how the universe could be eternal and essentially unchanging while still having the galaxies we observe moving away from each other. The theory hinged on the creation of matter between galaxies over time, so that even though galaxies get further apart, new ones that develop between them fill the space they leave. The resulting universe is in a "steady state" in the same manner that a flowing river is - the individual water molecules are moving away but the overall river remains the same.
The theory was the only serious alternative to the Big Bang which agreed with key observations of the day, namely Hubble's red shift observations, and Hoyle was a strong critic of the Big Bang. Ironically, he is responsible for coining the term "Big Bang" on BBC radio's Third Programme broadcast at 1830 GMT on 28 March 1949. It is popularly reported that Hoyle intended this to be pejorative, but the script from which he read aloud clearly shows that he intended the expression to help his listeners.[6] In addition, Hoyle explicitly denied that he was being insulting and said it was just a striking image meant to emphasize the difference between the two theories for radio listeners.[7]
Hoyle, unlike Gold and Bondi, offered an explanation for the appearance of new matter by postulating the existence of what he dubbed the "creation field", or just the "C-field", which had negative pressure in order to be consistent with the conservation of energy and drive the expansion of the universe. These features of the C-field anticipated the later development of cosmic inflation. They jointly argued that continuous creation was no more inexplicable than the appearance of the entire universe from nothing, although it had to be done on a regular basis. In the end, mounting observational evidence convinced most cosmologists that the steady state model was incorrect and that the Big Bang was the theory that agreed best with observations, although Hoyle continued to support and develop his theory. In 1993, in an attempt to explain some of the evidence against the steady state theory, he presented a modified version called "quasi-steady state cosmology" (QSS), but the theory is not widely accepted.
The evidence that resulted in the Big Bang's victory over the steady state model, at least in the minds of most cosmologists, included the discovery of the cosmic microwave background radiation in the 1960s, the distribution of "young galaxies" and quasars throughout the Universe in the 1980s, a more consistent age estimate of the universe and most recently the observations of the COBE satellite in the 1990s and the Wilkinson Microwave Anisotropy Probe launched in 2001, which showed unevenness in the microwave background in the early universe, which corresponds to currently observed distributions of galaxies.
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Hoyle appeared in a series of radio talks on astronomy for the BBC in the 1950s; these were collected in the book The Nature of the Universe, and he went on to write a number of other popular science books. In 1957 he was elected a Fellow of the Royal Society, and he was knighted in 1972. He was jointly awarded the Crafoord Prize by the Royal Swedish Academy of Sciences.
In the play Sur la route de Montalcino, the character of Fred Hoyle confronts Georges Lemaître on a fictional journey to the Vatican in 1957.[8]
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Hoyle also wrote science fiction. In his first novel, The Black Cloud, most intelligent life in the universe takes the form of interstellar gas clouds; they are surprised to learn that intelligent life can also form on planets. He wrote a television series, A for Andromeda, which was also published as a novel. His play Rockets in Ursa Major had a professional production at the Mermaid Theatre in 1962.
In his later years, Hoyle became a staunch critic of theories of chemical evolution used to explain the naturalistic origin of life. With Chandra Wickramasinghe, Hoyle promoted the theory that life evolved in space, spreading through the universe via panspermia, and that evolution on earth is driven by a steady influx of viruses arriving via comets. In 1982, Hoyle presented Evolution from Space for the Royal Institution's Omni Lecture. After considering the very remote probability of evolution he concluded:
| “ | If one proceeds directly and straightforwardly in this matter, without being deflected by a fear of incurring the wrath of scientific opinion, one arrives at the conclusion that biomaterials with their amazing measure or order must be the outcome of intelligent design. No other possibility I have been able to think of...[9] | ” |
Published in his 1982/1984 books Evolution from Space (co-authored with Chandra Wickramasinghe), Hoyle calculated that the chance of obtaining the required set of enzymes for even the simplest living cell was one in 1040,000. Since the number of atoms in the known universe is infinitesimally tiny by comparison (1080), he argued that even a whole universe full of primordial soup would grant little chance to evolutionary processes. He claimed:
The notion that not only the biopolymer but the operating program of a living cell could be arrived at by chance in a primordial organic soup here on the Earth is evidently nonsense of a high order.
Hoyle compared the random emergence of even the simplest cell to the likelihood that "a tornado sweeping through a junk-yard might assemble a Boeing 747 from the materials therein." Hoyle also compared the chance of obtaining even a single functioning protein by chance combination of amino acids to a solar system full of blind men solving Rubik's Cube simultaneously.[10] (See the watchmaker analogy for similar reasoning.) Hoyle's statements and this line of reasoning (at various levels of accuracy) appears frequently in support of intelligent design. Mainstream evolutionary biology rejects Hoyle's interpretation of statistics, and strong supporters of Darwinism such as Richard Dawkins refer to this as "Hoyle's fallacy".
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Further occasions on which Hoyle aroused controversy included his questioning the authenticity of fossil Archaeopteryx and his condemnation of the failure to include Jocelyn Bell in the Nobel Prize award recognizing the development of radio interferometry and its role in the discovery of pulsars.
The most important of Hoyle's contributions was probably his work on nucleosynthesis: the idea that the chemical elements were synthesized from primordial hydrogen and helium in stars. Many thought it unfair that a Nobel prize was awarded to his collaborator William A Fowler, but Hoyle himself was excluded from the prize.
Hoyle had a famously heated argument with Martin Ryle of the Cavendish Radio Astronomy Group about Hoyle's steady state theory, which somewhat restricted collaboration between the Cavendish group and the Cambridge Institute of Astronomy during the 1960s.
Awards
Named after him
Most of these are independent of each other. Andromeda Breakthrough is a sequel to A for Andromeda and Into Deepest Space is a sequel to Rockets in Ursa Major. The four Ladybird Books are intended for children.
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