Thomas Gold
   HOME

TheInfoList



OR:

Thomas Gold (May 22, 1920 – June 22, 2004) was an
Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
n-born astrophysicist, who also held British and American citizenship. He was a professor of
astronomy Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...
at
Cornell University Cornell University is a Private university, private Ivy League research university based in Ithaca, New York, United States. The university was co-founded by American philanthropist Ezra Cornell and historian and educator Andrew Dickson W ...
, a member of the U.S.
National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, NGO, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the ...
, and a
Fellow of the Royal Society Fellowship of the Royal Society (FRS, ForMemRS and HonFRS) is an award granted by the Fellows of the Royal Society of London to individuals who have made a "substantial contribution to the improvement of natural science, natural knowledge, incl ...
(London). Gold was one of three young
Cambridge Cambridge ( ) is a List of cities in the United Kingdom, city and non-metropolitan district in the county of Cambridgeshire, England. It is the county town of Cambridgeshire and is located on the River Cam, north of London. As of the 2021 Unit ...
scientists who in 1948 proposed the now mostly abandoned "steady state" hypothesis of the
universe The universe is all of space and time and their contents. It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of matter and energy, and the structures they form, from s ...
. Gold's work crossed boundaries of academic and scientific disciplines, into
biophysics Biophysics is an interdisciplinary science that applies approaches and methods traditionally used in physics to study biological phenomena. Biophysics covers all scales of biological organization, from molecular to organismic and populations ...
,
astronomy Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...
, aerospace engineering, and
geophysics Geophysics () is a subject of natural science concerned with the physical processes and Physical property, properties of Earth and its surrounding space environment, and the use of quantitative methods for their analysis. Geophysicists conduct i ...
.


Early life

Gold was born on May 22, 1920, in
Vienna Vienna ( ; ; ) is the capital city, capital, List of largest cities in Austria, most populous city, and one of Federal states of Austria, nine federal states of Austria. It is Austria's primate city, with just over two million inhabitants. ...
,
Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
, to Max Gold, a wealthy
Jewish Jews (, , ), or the Jewish people, are an ethnoreligious group and nation, originating from the Israelites of History of ancient Israel and Judah, ancient Israel and Judah. They also traditionally adhere to Judaism. Jewish ethnicity, rel ...
industrialist (pre-war) who ran one of Austria's largest mining and metal fabrication companies, and German former actress Josefine Martin. Following the economic downfall of the European mining industry in the late 1920s, Max Gold moved his family to Berlin, where he had taken a job as director of a metal trading company.. Following the start of
Nazi Nazism (), formally named National Socialism (NS; , ), is the far-right politics, far-right Totalitarianism, totalitarian socio-political ideology and practices associated with Adolf Hitler and the Nazi Party (NSDAP) in Germany. During H ...
leader
Adolf Hitler Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born German politician who was the dictator of Nazi Germany from 1933 until Death of Adolf Hitler, his suicide in 1945. Adolf Hitler's rise to power, He rose to power as the lea ...
's anti-Jewish campaigns in 1933, Gold and his family left Germany because of his father's heritage. The family travelled through Europe for the next few years. Gold attended
boarding school A boarding school is a school where pupils live within premises while being given formal instruction. The word "boarding" is used in the sense of "room and board", i.e. lodging and meals. They have existed for many centuries, and now extend acr ...
at the Lyceum Alpinum Zuoz in Zuoz,
Switzerland Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...
, where he quickly proved to be a clever, competitive and physically and mentally aggressive individual.. Gold finished his schooling at Zuoz in 1938, and fled with his family to
England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
after the German invasion of Austria in early 1938. Gold entered
Trinity College, Cambridge Trinity College is a Colleges of the University of Cambridge, constituent college of the University of Cambridge. Founded in 1546 by King Henry VIII, Trinity is one of the largest Cambridge colleges, with the largest financial endowment of any ...
in 1939 and began studying mechanical sciences. In May 1940, just as Hitler was commencing his advance in
Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...
and
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
, Gold was sent into internment as an enemy alien by the British government. It was on the first night of internment, at an army barracks in Bury St Edmunds, that he met his future collaborator and close friend, Hermann Bondi... Gold spent most of his nearly 15 months of internment in a camp in Canada, after which he returned to England and reentered Cambridge University, where he abandoned his study of mechanical sciences for
physics Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge whi ...
. After graduating with a pass (Ordinary) degree in June 1942, Gold worked briefly as an agricultural labourer and
lumberjack Lumberjack is a mostly North American term for workers in the logging industry who perform the initial harvesting and transport of trees. The term usually refers to loggers in the era before 1945 in the United States, when trees were felled us ...
in northern England before joining Bondi and
Fred Hoyle Sir Fred Hoyle (24 June 1915 – 20 August 2001) was an English astronomer who formulated the theory of stellar nucleosynthesis and was one of the authors of the influential B2FH paper, B2FH paper. He also held controversial stances on oth ...
on naval research into radar ground clutter near Dunsfold,
Surrey Surrey () is a Ceremonial counties of England, ceremonial county in South East England. It is bordered by Greater London to the northeast, Kent to the east, East Sussex, East and West Sussex to the south, and Hampshire and Berkshire to the wes ...
. The three men would spend their off-duty hours in "intense and wide-ranging scientific discussion" on topics such as
cosmology Cosmology () is a branch of physics and metaphysics dealing with the nature of the universe, the cosmos. The term ''cosmology'' was first used in English in 1656 in Thomas Blount's ''Glossographia'', with the meaning of "a speaking of the wo ...
,
mathematics Mathematics is a field of study that discovers and organizes methods, Mathematical theory, theories and theorems that are developed and Mathematical proof, proved for the needs of empirical sciences and mathematics itself. There are many ar ...
and astrophysics.. Within months, Gold was placed in charge of constructing new radar systems. Gold determined how landing craft could use radar to navigate to the appropriate landing spot on D-Day and also discovered that the German navy had fitted snorkels to its
U-boat U-boats are Submarine#Military, naval submarines operated by Germany, including during the World War I, First and Second World Wars. The term is an Anglicization#Loanwords, anglicized form of the German word , a shortening of (), though the G ...
s, making them operable underwater while still taking in air from above the surface.


Schooling and work in England

Immediately after the war, Hoyle and Bondi returned to Cambridge, while Gold stayed with naval research until 1947. He then began working at Cambridge's Cavendish Laboratory to help construct the world's largest
magnetron The cavity magnetron is a high-power vacuum tube used in early radar systems and subsequently in microwave oven, microwave ovens and in linear particle accelerators. A cavity magnetron generates microwaves using the interaction of a stream of ...
, a device invented by two British scientists in 1940 that generated intense
microwave Microwave is a form of electromagnetic radiation with wavelengths shorter than other radio waves but longer than infrared waves. Its wavelength ranges from about one meter to one millimeter, corresponding to frequency, frequencies between 300&n ...
s for radar. Soon after, Gold joined R. J. Pumphrey, a
zoologist Zoology ( , ) is the scientific study of animals. Its studies include the structure, embryology, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems. Zoology is one ...
at the Cambridge Zoology Laboratory who had served as the deputy head of radar naval research during the war, to study the effect of
resonance Resonance is a phenomenon that occurs when an object or system is subjected to an external force or vibration whose frequency matches a resonant frequency (or resonance frequency) of the system, defined as a frequency that generates a maximu ...
on the human ear.


Theory of human hearing

Via simple experimentation in 1946, Gold found that the degree of resonance observed in the
cochlea The cochlea is the part of the inner ear involved in hearing. It is a spiral-shaped cavity in the bony labyrinth, in humans making 2.75 turns around its axis, the modiolus (cochlea), modiolus. A core component of the cochlea is the organ of Cort ...
was not in accordance with the level of damping that would be expected from the
viscosity Viscosity is a measure of a fluid's rate-dependent drag (physics), resistance to a change in shape or to movement of its neighboring portions relative to one another. For liquids, it corresponds to the informal concept of ''thickness''; for e ...
of the watery liquid that fills the inner ear. As recounted by
Freeman Dyson Freeman John Dyson (15 December 1923 – 28 February 2020) was a British-American theoretical physics, theoretical physicist and mathematician known for his works in quantum field theory, astrophysics, random matrix, random matrices, math ...
, who was one of the fellow students at Cambridge whom Gold experimented on, the procedure was "simple, elegant, and original." Gold built his experimental apparatus out of war surplus Navy electronics and headphones. This was equipment that Gold had used during his
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
assignment to the
Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
as a
radar Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track ...
and radio communications specialist. In 1948 he published two papers on his results; one described the theory and the other reporting the experimental results. His theory was that the ear operates instead in the same way as does a "regenerative radio receiver" by adding energy at the same frequency it is trying to detect. (Later this became known as otoacoustic emission.) Although Gold won a prize fellowship from Trinity College for his thesis on this proposed mechanism of hearing and obtained a junior lectureship at the Cavendish Laboratory, his theory was widely ignored by ear specialists and physiologists, such as future (1961)
Nobel Prize The Nobel Prizes ( ; ; ) are awards administered by the Nobel Foundation and granted in accordance with the principle of "for the greatest benefit to humankind". The prizes were first awarded in 1901, marking the fifth anniversary of Alfred N ...
winner Georg von Békésy, who did not believe the cochlea operated under a feedback system. Later, however, researchers discovered that Gold's hypothesis had been correct. As reported in one of the science obituaries published about Gold in 2004, "Ignored for over 30 years, his research was rediscovered in the 1970s when physiologists discovered the tiny hair cells that act as amplifiers in the inner ear."


Steady-state theory

Gold began discussing problems in physics with Hoyle and Bondi again, centering on the issues over
redshift In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light). The opposite change, a decrease in wavelength and increase in frequency and e ...
and Hubble's law. This led the three to all start questioning the
Big Bang The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models based on the Big Bang concept explain a broad range of phenomena, including th ...
theory originally proposed by Georges Lemaître in 1931 and later advanced by George Gamow, which suggested that the
universe The universe is all of space and time and their contents. It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of matter and energy, and the structures they form, from s ...
expanded from an extremely dense and hot state and continues to expand today. As recounted in a 1978 interview with physicist and historian Spencer R. Weart, Gold believed that there was reason to think that the creation of matter was "done all the time and then none of the problems about fleeting moments arise. It can be just in a steady state with the expansion taking things apart as fast as new matter comes into being and condenses into new galaxies".. Two papers were published in 1948 discussing the " steady-state theory" as an alternative to the Big Bang: one by Hermann Bondi and Gold, the other by
Fred Hoyle Sir Fred Hoyle (24 June 1915 – 20 August 2001) was an English astronomer who formulated the theory of stellar nucleosynthesis and was one of the authors of the influential B2FH paper, B2FH paper. He also held controversial stances on oth ...
. In their seminal paper, Bondi and Gold asserted that although the universe is expanding, it nevertheless does not change its look over time; it has no beginning and no end.. They proposed the perfect cosmological principle as the underpinning of their theory, which held that the
universe The universe is all of space and time and their contents. It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of matter and energy, and the structures they form, from s ...
is homogeneous and isotropic in space and time. On the large scale, they argued that there "is nothing outstanding about any place in the universe, and that those differences which do exist are only of local significance; that seen on a large scale the universe is homogeneous." However, since the universe was not characterized by a lack of evolution, distinguishing features or recognizable direction of time, they postulated that there had to be large-scale motions in the universe. They highlighted two possible types of motion: large-scale expansion and its reverse, large-scale contraction. They estimated that within the expanding universe,
hydrogen Hydrogen is a chemical element; it has chemical symbol, symbol H and atomic number 1. It is the lightest and abundance of the chemical elements, most abundant chemical element in the universe, constituting about 75% of all baryon, normal matter ...
atoms were being created out of a vacuum at a rate of one atom per cubic meter per 109 years. This creation of matter would keep the density of the universe constant as it expanded. Gold and Bondi also stated that the issues with time scale that had plagued other cosmological theories – such as the discrepancy between the age of the universe as calculated by Hubble and dating of radioactive decay in terrestrial rocks – were absent for the steady-state theory. It was not until the 1960s that major problems with the steady-state theory began to emerge, when observations apparently supported the idea that the universe was in fact changing:
quasar A quasar ( ) is an extremely Luminosity, luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is powered by accretion onto a supermassive black hole with a mass rangi ...
s and radio galaxies were found only at large distances (therefore existing only in the distant past), not in closer galaxies. Whereas the Big Bang theory predicted as much, steady state predicted that such objects would be found everywhere, including close to our own galaxy, since evolution would be more evenly distributed, not observed only at great distances. In addition, proponents of the theory predicted that in addition to hydrogen atoms,
antimatter In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding subatomic particle, particles in "ordinary" matter, and can be thought of as matter with reversed charge and parity, or go ...
would also be produced, as with cosmic gamma ray background from the annihilation of
proton A proton is a stable subatomic particle, symbol , Hydron (chemistry), H+, or 1H+ with a positive electric charge of +1 ''e'' (elementary charge). Its mass is slightly less than the mass of a neutron and approximately times the mass of an e ...
s and antiprotons and
X-ray An X-ray (also known in many languages as Röntgen radiation) is a form of high-energy electromagnetic radiation with a wavelength shorter than those of ultraviolet rays and longer than those of gamma rays. Roughly, X-rays have a wavelength ran ...
emitting gas from the creation of
neutron The neutron is a subatomic particle, symbol or , that has no electric charge, and a mass slightly greater than that of a proton. The Discovery of the neutron, neutron was discovered by James Chadwick in 1932, leading to the discovery of nucle ...
s. For most cosmologists, the refutation of the steady-state theory came with the discovery of the
cosmic microwave background radiation The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard optical telescope, the background space between stars and galaxies is almost completely dar ...
in 1965, which was predicted by the Big Bang theory.. Stephen Hawking said that the fact that microwave radiation had been found, and that it was thought to be left over from the Big Bang, was "the final nail in the coffin of the steady-state theory." Bondi conceded that the theory had been disproved, but Hoyle and Gold remained unconvinced for a number of years. Gold even supported Hoyle's modified steady-state theory; however, by 1998 he started to express some doubts about the theory, but maintained that despite its faults, the theory helped improve understanding regarding the origin of the universe.


Extra-galactic radio signals

In 1951, at a meeting of the
Royal Astronomical Society The Royal Astronomical Society (RAS) is a learned society and charitable organisation, charity that encourages and promotes the study of astronomy, planetary science, solar-system science, geophysics and closely related branches of science. Its ...
, Gold proposed that the source of recent radio signals detected from space was outside the
Milky Way The Milky Way or Milky Way Galaxy is the galaxy that includes the Solar System, with the name describing the #Appearance, galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars in other arms of the galax ...
galaxy, much to the derision of radio astronomer Martin Ryle and several mathematical cosmologists. However, a year later, a distant source was identified and Gold announced at an
International Astronomical Union The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and developmen ...
meeting in Rome that his theory had been proven. Ryle would later take Gold's argument as proof of extragalactic evolution, claiming that it invalidated the steady-state theory.


Shock wave origin of magnetic storms

Gold left Cambridge in 1952 to become the chief assistant to Astronomer Royal Harold Spencer Jones at the Royal Greenwich Observatory in Herstmonceux,
Sussex Sussex (Help:IPA/English, /ˈsʌsɪks/; from the Old English ''Sūþseaxe''; lit. 'South Saxons'; 'Sussex') is an area within South East England that was historically a kingdom of Sussex, kingdom and, later, a Historic counties of England, ...
,
England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
. While there, Gold attracted some controversy by suggesting that the interaction between charged particles from the Sun with the Earth's
magnetic field A magnetic field (sometimes called B-field) is a physical field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular ...
in creating magnetic storms in the upper atmosphere was an example of a collisionless
shock wave In physics, a shock wave (also spelled shockwave), or shock, is a type of propagating disturbance that moves faster than the local speed of sound in the medium. Like an ordinary wave, a shock wave carries energy and can propagate through a me ...
.. The theory was widely disputed, until American scientists in 1957 discovered that Gold's theory held up to mathematical scrutiny by conducting a simulation using a shock tube.


Astrophysics work in the USA

Gold resigned from the Royal Observatory following Spencer-Jones's retirement and moved to the United States in 1956, where he served as Professor of Astronomy (1957–1958) and Robert Wheeler Wilson Professor of Applied Astronomy (1958–1959) at
Harvard University Harvard University is a Private university, private Ivy League research university in Cambridge, Massachusetts, United States. Founded in 1636 and named for its first benefactor, the History of the Puritans in North America, Puritan clergyma ...
. In early 1959, he accepted an appointment at
Cornell University Cornell University is a Private university, private Ivy League research university based in Ithaca, New York, United States. The university was co-founded by American philanthropist Ezra Cornell and historian and educator Andrew Dickson W ...
, which had offered him the opportunity to set up an
interdisciplinary Interdisciplinarity or interdisciplinary studies involves the combination of multiple academic disciplines into one activity (e.g., a research project). It draws knowledge from several fields such as sociology, anthropology, psychology, economi ...
unit for radiophysics and space research, and take charge of the Department of Astronomy.. At the time, there was only one other faculty member in the department. Gold would serve as director of the Center for Radiophysics and Space Research until 1981, establishing Cornell as a leading hub of scientific research. During his tenure, Gold hired famed astronomers Carl Sagan and Frank Drake, helped establish the world's largest
radio telescope A radio telescope is a specialized antenna (radio), antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky. Radio telescopes are the main observing instrument used in radio astronomy, which studies the r ...
at the Arecibo Observatory in Puerto Rico and the Cornell-Sydney University Astronomy Center with Harry Messel. In addition, Gold served as Assistant Vice President for Research from 1969–1971 and the John L. Wetherill Professor of Astronomy from 1971 until his retirement in 1986...


Solar nanoflares and Earth's magnetosphere

In 1959, Gold expanded on his previous prediction of a collisionless shock wave, arguing that solar flares would eject material into magnetic clouds to produce a shock front that would result in geomagnetic storms. He also coined the term "
magnetosphere In astronomy and planetary science, a magnetosphere is a region of space surrounding an astronomical object in which charged particles are affected by that object's magnetic field. It is created by a celestial body with an active interior Dynamo ...
" in his paper "Motions in the Magnetosphere of the Earth" to describe "the region above the
ionosphere The ionosphere () is the ionized part of the upper atmosphere of Earth, from about to above sea level, a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar radiation. It plays ...
in which the magnetic field of the Earth has a dominant control over the motions of gas and fast charged particles ... hich wasknown to extend out to a distance of the order of 10 Earth radii". A 2015 paper titled "Modelling nanoflares in active regions and implications for coronal heating mechanisms," attributes the initial idea of the cause of magnetic storms above Earth to Gold: "The heating of the
solar corona In astronomy, a corona (: coronas or coronae) is the outermost layer of a star's Stellar atmosphere, atmosphere. It is a hot but relatively luminosity, dim region of Plasma (physics), plasma populated by intermittent coronal structures such as so ...
by small, impulsive heating events appears to date to a discussion by Gold and the subsequent more quantitative proposal of Levine ,3that small coronal current sheets were responsible for the heating."


Panspermia and pulsars

In 1960, Gold collaborated again with Fred Hoyle to show that magnetic energy fueled solar flares and that flares were triggered when opposite magnetic loops interact and release their stored energy. In 1960, Gold suggested a "garbage theory" for the origin of life, thus constituting a kind of "accidental panspermia". The theory proposes that life on Earth might have spread from a pile of
waste Waste are unwanted or unusable materials. Waste is any substance discarded after primary use, or is worthless, defective and of no use. A by-product, by contrast is a joint product of relatively minor Value (economics), economic value. A wast ...
products accidentally dumped on Earth long ago by extraterrestrials. In 1968, a Cambridge radio astronomy postgraduate education, postgraduate student Jocelyn Bell Burnell and her doctoral adviser Antony Hewish discovered a Pulse (signal processing), pulsing radio source with a frequency, period of 1.337 seconds. The source – which was termed "pulsar" – emitted beams of electromagnetic radiation at a very short and consistent interval. Gold proposed that these objects were rapidly rotating neutron stars. Gold argued that due to their strong magnetism, magnetic fields and high rotational speed, pulsars would emit radiation similar to a rotating beacon. Gold's conclusion was initially not well received by the scientific community; in fact, he was refused permission to present his theory at the first international conference on pulsars. However, Gold's theory became widely accepted following the discovery of a pulsar in the Crab Nebula using the Arecibo radio telescope, opening the door for future advancements in solid-state physics and astronomy. Anthony Tucker of ''The Guardian'' remarked that Gold's discovery paved the way for Stephen Hawking's groundbreaking research into black holes.


Moon dust and NASA

From the 1950s, Gold served as a consultant to NASA and held positions on several national space committees, including the President's Science Advisory Committee, as the United States tried to develop its space program. At the time, scientists were engaged in a heated debate over the physical properties of the Moon's surface. In 1955, he predicted that the Moon was covered by a layer of fine rock powder stemming from "the ceaseless bombardment of its surface by Solar System debris". This led to the dust being jokingly referred to as "Gold dust" or "Gold's dust".. Gold initially suggested that astronauts would sink into the dust, but upon later analysis of impact craters and electrostatic fields, he determined that the astronauts' boots would sink only three centimeters into the Moon's surface. In any case, NASA sent unmanned Surveyor Program, Surveyors to analyze the conditions on the surface of the Moon. Gold was ridiculed by fellow scientists, not only for his hypothesis, but for the approach he took in communicating NASA's concerns to the American public; in particular, some experts were infuriated with his usage of the term "Moon dust" in reference to lunar regolith.. When the Apollo 11 crew landed on the Moon in 1969 and brought back the first samples of lunar rocks, researchers found that lunar soil was in fact powdery. Gold said the findings were consistent with his hypothesis, noting that "in one area as they walked along, they sank in between five and eight inches". However, Gold received little credit for his correct prediction, and was even criticized for his original prediction of a deep layer of lunar dust. Gold had also contributed to the Apollo program by designing the Apollo Lunar Surface Closeup Camera (ALSCC) (a kind of stereo camera) used on the Apollo 11, 12, and 14 missions. In the 1970s and 1980s, Gold was a vocal critic of NASA's Space Shuttle program, deriding claims that the agency could fly 50 missions a year or that it could have low budget costs. NASA officials warned Gold that if he testified his concerns before Congress, his research proposals would lose their support from NASA. Gold ignored the warning and testified before a Congressional committee headed by Senator Walter Mondale. In a letter to NASA administrator James C. Fletcher, George Low wrote that "Gold should realize that being funded by the Government and NASA is a privilege, and that it would make little sense for us to fund him as long as his views are what they are now".. Gold recalled the aftermath of his testimony in a 1983 interview with astronomy historian David H. DeVorkin:
I had a very hard time with NASA, year after year. I got some more money, but eventually it fizzled out, after three years or so after this event. My applications, which previously each year had always gone through very smoothly, were turned down. I would then have to go to Washington, discuss it with them. and I then would get a certain fraction of it resurrected. For several years running this happened, and then eventually it fizzled permanently, and I've not tried to get any money out of NASA since.
...
I was certainly regarded as persona non grata with NASA after that. I had a very hard time. Shortly after that Noel Hinners became the Space Science administrator, and he used to joke about it and say, "Oh. Tommy's got to come to his annual pilgrimage to Washington," and regarded it as very funny, but then he'd always give me some money. But always clearly as a persona non grata.


Contrarian views in geology and biology


Abiogenic origins of petroleum

Thomas Gold first became interested in the origins of petroleum in the 1950s, postulating a theory on the Abiogenic petroleum origin, abiogenic formation of fossil fuels. Gold engaged in thorough discussion on the matter with
Fred Hoyle Sir Fred Hoyle (24 June 1915 – 20 August 2001) was an English astronomer who formulated the theory of stellar nucleosynthesis and was one of the authors of the influential B2FH paper, B2FH paper. He also held controversial stances on oth ...
, who even included a chapter on "Gold's Pore Theory" in his 1955 book ''Frontiers in Astronomy''. While Russian scientists had long been at work explicating possible abiogenic origins of petroleum, the Cold War blocked knowledge of their publications until the 1990s. Thus, Thomas Gold was credited with the idea in the United States when current events prompted him to submit an opinion piece to the ''Wall Street Journal'' in June 1977 titled, "Rethinking the origins of oil and gas." Concern about 1973 oil crisis, gasoline shortages that began in 1973 were still troubling the economy. A striking discovery in the deep-sea just four months earlier (February 1977) was another impetus: Exploration and photography of a deep-sea community, deep-sea hydrothermal vent showed a dense amount of life living on chemical energy. Stationary organisms depending on vent outflows included albino clams and tube worms larger than ever seen in surface marine ecosystems. Most astonishing was that such ecosystems were based on microbial life living entirely on chemosynthesis, chemosynthetic rather than photosynthetic ways of capturing energy and building living cells. Science communicator Paul Davies explained Gold's theory in this way: "Conventional wisdom has it that oil and coal are remnants of ancient surface life that became buried and subjected to extremes of temperature and pressure. Gold maintains that these deposits are not fossil fuels in the normal sense, but the products of primordial hydrocarbons dating from the time of the Earth's formation. He claims that over the aeons the volatile gases migrate towards the surface through cracks in the crust, and either leak into the atmosphere as methane, become trapped in sub-surface gas fields, or are robbed of their hydrogen to become oil, tar or carbonaceous material like coal." As to the ubiquity of abiotic hydrocarbons in the solar system, a 1999 profile of Gold in the ''Washington Post'' quoted him as saying, "it always seemed absurd to me to see petroleum hydrocarbons on other planets, where there was obviously never any vegetation, even as we insist that on Earth they must be biological in origin."


Earthquakes from rising methane

Having established the theoretical foundations of his abiogenic petroleum hypothesis, Gold began in-depth thinking and research on the kinds of empirical evidence that might land in its favor. First was collaborating with a former graduate student of his at
Cornell University Cornell University is a Private university, private Ivy League research university based in Ithaca, New York, United States. The university was co-founded by American philanthropist Ezra Cornell and historian and educator Andrew Dickson W ...
: Steven Soter. Soter had received his PhD in astronomy in 1971 and had recently concluded another faculty collaboration at Cornell: working with Carl Sagan in the writing of the television series, ''Cosmos: A Personal Voyage''. Gold and Soter teamed up to investigate the knowns and unknowns about earthquakes from the standpoint of plausible causation by or regular co-occurrence with sudden escape of large volumes of methane gas. The result was a series of papers, including two with "earthquakes" in the title: "North Sea-quakes" (''New Scientist'' 1979) and "Fluid Ascent through the Solid Lithosphere and its Relation to Earthquakes" (''Pure and Applied Geophysics'' 1985). Their 1980 article in ''Scientific American'' was titled "The Deep-Earth-Gas Hypothesis" and the explanatory value of the idea was presented as, providing "a unified basis for explaining a number of otherwise rather puzzling phenomena that either give warning of earthquakes or accompany them." Even so, they cautioned, "The sampling of such gases is just beginning, and the data will not yet support confident conclusions." The puzzling phenomena associated with earthquakes include "flames that shoot from the ground, earthquake lights, fierce bubbling in bodies of water, sulfurous air and the strange behavior of animals, loud explosive and hissing noises, and visible waves rolling slowly along alluvial ground." They constructed a map of the world depicting major oil-producing regions and areas with historical seismic activity. Several oil-rich regions, such as Alaska, Texas, the Caribbean, Mexico, Venezuela, the Persian Gulf, the Urals, Siberia, and Southeast Asia, were shown to be lying on major earthquake belts. Gold and Soter suggested that these belts may explain the upward migration of gases originating at depth. "The fact is that oil and gas fields show a distinct association with such earthquake-prone regions. The association suggests to us that the deep faults may provide a conduit for the continuous input of nonbiological methane streaming up from below. Moreover, the upward migration of methane and other gases in fault zones may contribute to the triggering of earthquakes." He also pointed to the abundance of helium in oil and gas reserves as evidence for "a deep source of the hydrocarbons".. Moreover, a few oil reserves thought to have been exhausted were suddenly generating vast amounts of crude oil. From this, Gold proposed that the Earth may possess a virtually endless supply – suggesting as much as "at least 500 million years' worth of gas" – of fossil fuels.


The helium anomaly

In later publications, Gold emphasized that the immense amounts of helium gas that surges upward during commercial petroleum production at some sites is proof in itself that substantial lightweight gases have indeed persisted at depth since the amalgamation of cosmic debris into planet Earth during the birth of this solar system. In his 1998 book, Gold closed his fourth chapter, "Evidence for Deep-Earth Gas," with a section titled "The Association of Helium with Hydrocarbons."


A test: Drilling deep into granite

Gold began testing his abiogenic petroleum theory in 1986. With the backing of a group of investors, Vattenfall and the Gas Research Institute, drilling of a deep borehole – named Gravberg-1 – commenced into the bedrock near Lake Siljan in Sweden. This was the site of a large meteor crater, which would have "opened channels deep enough for the methane to migrate upward" and formed deposits in Caprock#Petroleum, caprock just a few miles beneath the surface. He estimated that the Fracture (geology), fractures near Lake Siljan reached down nearly 40 kilometers into the earth.. In 1987, approximately of drilling fluid, drilling lubricant disappeared nearly into the ground, leading Gold to believe that the lubricant had fallen into a methane reservoir. Soon after, the team brought up nearly 100 liters of black oily sludge to the surface. Gold claimed that the sludge contained both oil and remnants of archaebacteria. He argued that "it suggests there is an enormous sphere of life, of biology, at deeper levels in the ground than we have had any knowledge of previously" and that this evidence would "destroy the orthodox argument that since oil contains biological molecules, oil reserves must have derived from biological material". The announcement of Gold's findings was met with mixed reactions, ranging from "furious incredulity" to "deep skepticism". Geochemist Geoffrey P. Glasby speculated that the sludge could have been formed from the Fischer–Tropsch process, a catalyst, catalyzed chemistry, chemical reaction in which syngas, synthesis gas, a mixture of carbon monoxide and
hydrogen Hydrogen is a chemical element; it has chemical symbol, symbol H and atomic number 1. It is the lightest and abundance of the chemical elements, most abundant chemical element in the universe, constituting about 75% of all baryon, normal matter ...
, is converted into liquid hydrocarbons. Critics also dismissed Gold's archaebacteria finding, stating that "since micro-organisms cannot survive at such depth, the bacteria prove that the well has been contaminated from the surface". Geochemist Paul Philp analyzed the sludge and concluded that he could not differentiate between the samples of sludge and petroleum seep, oil seep found in sedimentary shale rocks near the surface. He reasoned that oil had migrated from the shale down to the granite deep in the ground.. Gold disputed Philp's finding, believing that the oil and gas could have just as easily migrated up to the surface: "They would have it that the oil and gas we found down there was from the five feet of sediments on the top – had seeped all the way down six kilometres down into the granite. I mean, such complete absurdity: you can imagine sitting there with five feet of soil and six kilometres underneath of dense granitic rock, and that methane produced up there has crawled all the way down in preference to water. Absolute nonsense." In light of the controversy surrounding the sludge and possible drill contamination, Gold abandoned the project at Gravberg-1, calling it a "complete fiasco", and redesigned the experiment by replacing his oil-based drilling lubricant with a water-based one. The drill hit oil in the spring of 1989, but only collected about . Gold stated, "It was not coming up at a rate at which you could sell it, but it showed there was oil down there." The drill then ran into technical problems and was stopped at a depth of 6.8 kilometers. The hole was closed, but a second hole was opened for drilling closer to the "center of the impact ring where there was even less sedimentary rock". By October 1991, the drill hit oil at a depth of 3.8 kilometers, but many skeptics remained unconvinced of the site's prospects. Geologist John R. Castaño concluded that there was insufficient evidence of the mantle as the hydrocarbon source and that it was unlikely that the Siljan site could be used as a commercial gas field. In 2019, a study of gases and secondary carbonate minerals revealed that long-term microbial methanogenesis has occurred in situ deep within the fracture system of the crater (for at least 80 million years) and with an obvious spatial link to seep oils of surficial sedimentary origin, at odds with Gold's theories of deep abiotic gas migration. Gold's later views on the drilling results can be found in chapter 6, "The Siljan Experiment," of his 1998 book. Another section of the book titled "The Upwelling Theory of Coal Formation" presents another argument in favor of the abiogenic model that he had not presented in an earlier paper. Similarly, he also presents arguments pertaining to the origin of diamonds and that microbial processes are the cause of mineral concentrations at depth.


Dispute nearly forgotten

In 1996 a paper published in the journal ''Social Studies of Science'' was titled, "Which Came First, the Fossil or the Fuel?" The author concluded:
Beginning in the late 1970s, Gold revived the 'abiogenic' theory, which holds that hydrocarbons are primordial, not remnants of decayed biology. By contesting the central tenet of petroleum geology, Gold precipitated a bitter scientific controversy. Both sides employed novel rhetorical strategies in order to impute interests, to contest expertise, to recruit allies from peripheral disciplines, and to claim the mantle of scientific method; and both managed to construct plausible interpretations of the available data.
The author reported that even the Siljan drilling results had not been sufficient to fully resolve the long-standing dispute about origins, although Gold's hypothesis is favored by only a very slim minority. As of 2024, "fossil fuel" is still the prevailing term widely in use in reference to petroleum resources, both within academia and without. Such terminology includes 21st century communications about the causes of climate change, anthropogenic climate change and proffered solutions to the crisis, such as the 2023 IPCC report, "Climate Change 2023 Synthesis Report: Summary for Policymakers." Overall, within the academic disciplines of geobiology and petroleum geology, criticism of Gold's abiogenic theory has been severe — but not entire. The dispute is more set aside and forgotten than resolved. As to whether Gold's framing of distinct chemosynthetic microbes are active and ubiquitous at depth, the established authorities have moved in his direction. (See next section.)


"Deep Hot Biosphere" theory

In a 1992 paper, "The Deep, Hot Biosphere", Gold first suggested that microbial life is widespread in the porosity of the crust of the Earth, down to depths of several kilometers, where rising temperatures finally set a limit. The subsurface life obtains its energy not from photosynthesis but from chemical sources in fluids migrating upwards through the crust. The mass of the deep biosphere may be comparable to that of the surface biosphere. Subsurface life may be widespread on other bodies in the solar system and throughout the universe, even on worlds unaccompanied by other stars. A 1993 article by journalist William Broad, published in ''The New York Times'' and title
"Strange New Microbes Hint at a Vast Subterranean World,"
carried Gold's thesis to public attention. The article began, "New forms of microbial life are being discovered in such abundance deep inside the Earth that some scientists are beginning to suspect that the planet has a hidden biosphere extending miles down whose total mass may rival or exceed that of all surface life. If a deep biosphere does exist, scientists say, its discovery will rewrite textbooks while shedding new light on the mystery of life's origins. Even skeptics say the thesis is intriguing enough to warrant new studies of the subterranean realm." The 1993 article also features how Gold's thesis expands possibilities for astrobiology research: "Dr. Thomas Gold, an astrophysicist at Cornell University known for bold theorizing, has speculated that subterranean life may dot the cosmos, secluded beneath the surfaces of planets and moons and energized by geological processes, with no need for the warming radiation of nearby stars. He wrote in ''The Proceedings of the National Academy of Sciences'' last year that the solar system might harbor at least 10 deep biospheres. 'Such life may be widely disseminated in the universe,' he said, 'since planetary type bodies with similar subsurface conditions may be common as solitary objects in space, as well as in other solar-type systems.'" Gold also published a book of the same title, ''The Deep Hot Biosphere'', in 1999, which expanded on the arguments in his 1992 paper and included speculations on the origin of life and on horizontal gene transfer. According to Gold, bacteria feeding on the oil accounts for the presence of biological debris in Fossil fuel, hydrocarbon fuels, obviating the need to resort to a biogenic theory for the origin of the latter. The flows of underground hydrocarbons may also explain oddities in the concentration of other mineral deposits. In short, Gold said about the origin of natural hydrocarbons (petroleum and natural gas): ''Hydrocarbons are not biology reworked by geology (as the traditional view would hold), but rather geology reworked by biology''.
Freeman Dyson Freeman John Dyson (15 December 1923 – 28 February 2020) was a British-American theoretical physics, theoretical physicist and mathematician known for his works in quantum field theory, astrophysics, random matrix, random matrices, math ...
wrote the foreword to Gold's 1999 book, where he concluded, "Gold's theories are always original, always important, usually controversial — and usually right. It is my belief, based on fifty years of observation of Gold as a friend and colleague, that the deep hot biosphere is all of the above: original, important, controversial — and right." (Dyson also delivered a eulogy at Gold's memorial service, a segment of which pertaining to the deep hot biosphere theory is posted on youtube.) Following Gold's death, scientific discoveries amplified and also shifted understanding of the deep hot biosphere into what is now generally called deep biosphere. However, it is only at great depth where naturally occurring geochemistry, geochemical processes induced by intense heat and pressure produce elemental
hydrogen Hydrogen is a chemical element; it has chemical symbol, symbol H and atomic number 1. It is the lightest and abundance of the chemical elements, most abundant chemical element in the universe, constituting about 75% of all baryon, normal matter ...
and carbon dioxide upon which novel metabolisms of life (especially among the primitive Archaea) could have evolved. A retrospective paper published in the same journal as Gold's 1992 paper featured the metabolic and genetic discoveries of life forms at depth that Gold's paper inspired. Titled "The Deep, Hot Biosphere: Twenty-five years of retrospection," the authors conclude:
The pioneering ideas proposed by Thomas Gold inspired a generation of researchers in the field of geobiology to dive deeper into the possibilities of subsurface life, spawning hundreds of relevant publications.... Deep hydrocarbon deposits on Mars, Titan (moon), Titan, and worlds beyond could play host to life similar to that in Earth’s own crust. The techniques used to better study and understand deep, hot biospheres on Earth could then be applied to robotically probe targets in deep space as we move into the next century of scientific discovery. Technology is advancing at a rate wherein we may find that Gold’s deep, hot biosphere is not only true, but common across the universe.
A term Gold coined in his 1999 book carries forward, too, and is a reminder of the worldview shift he advocated. The term is "surface chauvinism". Gold wrote, "In retrospect, it is not hard to understand why the scientific community has typically sought only ''surface'' life in the heavens. Scientists have been hindered by a sort of 'surface chauvinism.'" In 2024 NASA launched the first spacecraft, Europa Clipper, to study and sample whether one of the moons of an outer planet that Gold had pointed to as a prospect for deep life (Europa (moon), Europa, a moon of Jupiter) might indeed harbor the physical and chemical conditions essential for carbon-based life.


Academic legacy

Throughout his academic career, Gold received a number of honors and distinctions. He was a Fellow of the
Royal Astronomical Society The Royal Astronomical Society (RAS) is a learned society and charitable organisation, charity that encourages and promotes the study of astronomy, planetary science, solar-system science, geophysics and closely related branches of science. Its ...
(1948), the Royal Society (1964), the American Geophysical Union (1962), the American Academy of Arts and Sciences (1974), and the American Astronautical Society, a member of the American Philosophical Society (1972), the United States National Academy of Sciences (1974) and the International Academy of Astronautics, and an Honorary Fellow of Trinity College, Cambridge (1986). In addition, he served as President of the New York Astronomical Society from 1981 to 1986. Gold won the John Frederick Lewis Award from the American Philosophical Society in 1972 for his paper "The Nature of the Lunar Surface: Recent Evidence" and the Humboldt Prize from the Alexander von Humboldt Foundation in 1979.. In 1985, Gold won the prestigious Gold Medal of the Royal Astronomical Society, an award whose recipients include Fred Hoyle, Hermann Bondi, Martin Ryle, Edwin Hubble, James Van Allen, Fritz Zwicky, Hannes Alfvén and Albert Einstein. Gold did not earn a doctorate, but received an honorary Doctor of Science degree from Cambridge University in 1969.. Following his death in 2004, obituaries laying out the breadth of his scientific inquiries appeared in a number of scientific journals. In the journal ''Nature (journal), Nature'', Hermann Bondi wrote "Tommy Gold will long be remembered as a singular scientist who stepped into any field where he thought an option was being overlooked. He was also unusual in working mainly theoretically, but using little mathematics, relying instead on his profound intuitive understanding of physics." The obituary in ''Physics Today'' included a listing of topics he delved into: "the alignment of galactic dust, the instability of Earth’s axis of rotation, the dusty lunar surface, the Sun's cosmic rays, and plasmas and magnetic fields in the solar system ... the origin of solar flares, the nature of time, molecules and masers in the interstellar medium, rotating neutron stars and the nature of pulsars, terrestrial sources of hydrocarbons, and the deep Earth biosphere." Gold's boldness in his approach is another aspect of his legacy. The obituary in the ''Bulletin of the American Astronomical Society'' called attention to his being "regarded by some as a scientific maverick who delighted in controversy. In reality, he was an iconoclast whose strength was in penetrating analysis of the assumptions on which some of our most important theories are based.... Tommy's paradigm-changing ideas in astronomy and planetary science, while original and bold, were also highly controversial. With his radical work on the origin of natural gas and petroleum, the controversy is likely to continue.... He will be remembered as one of the most interesting, dynamic and influential scientists of his generation." The obituary in ''The Guardian'' stated that Gold would "dive into new territory to open up problems unseen by others — in biophysics, astrophysics, space engineering, or geophysics. Controversy followed him everywhere. Possessing profound scientific intuition and open-minded rigour, he usually ended up challenging the cherished assumptions of others and, to the discomfiture of the scientific establishment, often found them wanting. His stature and influence were international."


Personal life

Gold married his first wife, Merle Gold, Merle Eleanor Tuberg, an American astrophysicist who had worked with Subrahmanyan Chandrasekhar, in Cambridge in 1947. He had three daughters with her – Linda, Lucy, and Tanya. After divorcing her, Gold married Carvel Lee Beyer in 1972. With her, he had a daughter Lauren. Thomas Gold died at the age of 84 from complications due to heart disease, at Cayuga Medical Center in Ithaca, New York. He was buried in the Pleasant Grove Cemetery in Ithaca.. He was survived by his wife, four daughters, and six grandchildren.


Selected publications

* . * . * . * . * . * . * . * . * . * . * . * . * . * . * . * . * .


See also

* Abiogenic petroleum origin * Gold universe * Astronomy * Astrophysics * Petroleum * Theoretical astrophysics


Notes


References

* . * . * . * . * . * . * . * . * . * . * . * . * . * * . * . * . *


External links


The Origin of Methane (and Oil) in the Crust of the Earth (Thomas Gold)
U.S.G.S. Professional Paper 1570, The Future of Energy Gases, 1993 * . * . * . * . * . * . * . * . * . * .
Thomas Gold Publications – HarvardNational Academy of Sciences Biographical Memoir
{{DEFAULTSORT:Gold, Thomas 1920 births 2004 deaths Alumni of Trinity College, Cambridge American aerospace engineers 20th-century American astronomers American biophysicists American geophysicists American people of Austrian-Jewish descent 20th-century Austrian astronomers Austrian biophysicists Cornell University faculty American cosmologists Fellows of the Royal Astronomical Society Foreign fellows of the Royal Astronomical Society Fellows of the Royal Society Fellows of Trinity College, Cambridge Harvard University faculty Members of the United States National Academy of Sciences Panspermia Scientists from Vienna Recipients of the Gold Medal of the Royal Astronomical Society Fellows of the American Geophysical Union 20th-century American engineers Alumni of Lyceum Alpinum Zuoz Members of the American Philosophical Society