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Helge Kragh [140]Helge S. Kragh [5]
  1.  9
    Georges Lemaître, Pioneer of Modern Theoretical Cosmology.Helge Kragh - 2018 - Foundations of Physics 48 (10):1333-1348.
    No other scientist may have had a greater impact on modern cosmology than the Belgian physicist, astronomer and priest Georges Lemaître. In 1927 he predicted the expansion of the universe on the basis of the cosmological field equations; and four years later he proposed what he called the primeval-atom hypothesis, the first version of the later big bang universe. In all his work on cosmology the cosmological constant Λ played a significant role. A recognized expert in the theory of general (...)
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  2.  94
    Contemporary History of Cosmology and the Controversy Over the Multiverse.Helge Kragh - 2009 - Annals of Science 66 (4):529-551.
    Cosmology has always been different from other areas of the natural sciences. Although an observationally supported standard model of the universe emerged in the 1960s, more speculative models and conceptions continued to attract attention. During the last decade, ideas of multiple universes based on anthropic reasoning have become very popular among cosmologists and theoretical physicists. This had led to a major debate within the scientific community of the epistemic standards of modern cosmology. Is the multiverse a scientific hypothesis, or is (...)
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  3.  30
    "The Most Philosophically Important of All the Sciences": Karl Popper and Physical Cosmology.Helge Kragh - 2013 - Perspectives on Science 21 (3):325-357.
    While Karl Popper’s philosophy of science has only few followers among modern philosophers, it is easily the view of science with the biggest impact on practicing scientists. According to Peter Medawar, Nobel laureate and eminent physiologist, Popper was the greatest authority ever on the scientific method. He praised the “great strength of Karl Popper’s conception of the scientific process,” a main reason for the praise being “that it is realistic—it gives a pretty fair picture of what goes on in real (...)
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  4.  43
    Conceptions of Cosmos: From Myths to the Accelerating Universe: A History of Cosmology.Helge S. Kragh - 2006 - Oxford University Press.
    This book presents the history of how the universe at large became the object of scientific understanding. Starting with the ancient creation myths, it offers an integrated and comprehensive account of cosmology that covers all major events from Aristotle's Earth-centred cosmos to the recent discovery of the accelearting universe.
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  5.  4
    Fifteen Years of the History of Science in Europe: Personal Reflections by the ESHS Presidents.Koen Vermeir, Claude Debru, Robert Fox, Eberhard Knobloch, Helge Kragh, Soňa Štrbáňová, Fabio Bevilacqua, Karine Chemla & Antoni Malet - 2018 - Centaurus 60 (1-2):104-123.
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  6.  9
    Erwin Schrödinger and the Wave Equation: The Crucial Phase.Helge Kragh - 1982 - Centaurus 26 (2):154-197.
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  7.  12
    Who Discovered the Expanding Universe?Helge Kragh & Robert W. Smith - 2003 - History of Science 41 (2):141-162.
  8.  2
    A Controversial Molecule: The Early History of Triatomic Hydrogen.Helge Kragh - 2011 - Centaurus 53 (4):257-279.
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  9.  27
    Conceptual Changes in Chemistry: The Notion of a Chemical Element, Ca. 1900–1925.Helge Kragh - 2000 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 31 (4):435-450.
  10.  5
    On Modern Cosmology and its Place in Science Education.Helge Kragh - 2011 - Science & Education 20 (3-4):343-357.
  11.  6
    A Sense of History: History of Science and the Teaching of Introductory Quantum Theory.Helge Kragh - 1992 - Science & Education 1 (4):349-363.
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  12.  20
    Testability and Epistemic Shifts in Modern Cosmology.Helge Kragh - 2014 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 46 (1):48-56.
    During the last decade new developments in theoretical and speculative cosmology have reopened the old discussion of cosmology's scientific status and the more general question of the demarcation between science and non-science. The multiverse hypothesis, in particular, is central to this discussion and controversial because it seems to disagree with methodological and epistemic standards traditionally accepted in the physical sciences. But what are these standards and how sacrosanct are they? Does anthropic multiverse cosmology rest on evaluation criteria that conflict with (...)
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  13.  53
    From Time Atoms to Space-Time Quantization: The Idea of Discrete Time, Ca 1925–1936.Helge Kragh & Bruno Carazza - 1994 - Studies in History and Philosophy of Science Part A 25 (3):437-462.
  14.  1
    Concept and Controversy: Jean Becquerel and the Positive Electron.Helge Kragh - 1989 - Centaurus 32 (2):203-240.
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  15.  15
    “The Most Philosophically of All the Sciences”: Karl Popper and Physical Cosmology.Helge Kragh - unknown
    Problems of scientific cosmology only rarely occur in the works of Karl Popper. Nevertheless, it was a subject that interested him and which he occasionally commented on. What is more important, his general claim of falsifiability as a criterion that demarcates science from non-science has played a significant role in periods of the development of modern physical cosmology. The paper examines the historical contexts of the interaction between cosmology and Popperian philosophy of science. Apart from covering Popper’s inspiration from Einstein (...)
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  16.  4
    Julius Thomsen and Classical Thermochemistry.Helge Kragh - 1984 - British Journal for the History of Science 17 (3):255-272.
    Classical thermochemistry is inextricably bound up with the problem of chemical affinity. In 1851, when Julius Thomsen began his career in thermochemistry, the concept of chemical affinity had been in the centre of chemical enquiry for more than a century. In spite of many suggestions, preferably to explain affinity in terms of electrical or gravitational forces, almost nothing was known about the cause and nature of affinity. In this state of puzzling uncertainty some chemists felt it more advantageous to establish (...)
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  17.  6
    A Short History of Scientific Thought - by John Henry.Helge Kragh - 2012 - Centaurus 54 (3):250-251.
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  18.  12
    Julius Thomsen and 19th-Century Speculations on the Complexity of Atoms.Helge Kragh - 1982 - Annals of Science 39 (1):37-60.
    In the history of chemistry, the Danish chemist Julius Thomsen is best known for his contributions to thermochemistry. Throughout his life, he was a pronounced atomist and a tireless advocate of neo-Proutian views as to the constitution of matter. On many occasions, especially in his later years, he engaged in speculations concerning the unity of matter and the complexity of atoms. In this engagement, Thomsen was alone in Danish chemistry, but his works were representative of a large number of 19th-century (...)
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  19.  20
    The Concept of the Monopole. A Historical and Analytical Case-Study.Helge Kragh - 1981 - Studies in History and Philosophy of Science Part A 12 (2):141-172.
  20.  4
    Ludvig Lorenz and the Early Theory of Long-Distance Telephony.Helge Kragh - 1992 - Centaurus 35 (3):305-324.
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  21.  74
    Book Review: By Jagdish Mehra and Helmut Rechenberg. Springer, New York, 2000, Xxxvi+ 1612 Pp., $149.00 (Hardcover). [REVIEW]Helge Kragh - 2002 - Foundations of Physics 32 (1):187-189.
  22. Sommerfeld, the Quantum, and the Problem Approach to Physics.Helge Kragh - 2011 - Metascience 20 (1):87-90.
    In the early phase of the new history of physics that emerged at about 1970 and was pioneered by John Heilbron, Thomas Kuhn, Paul Forman, and others, the quantum and atomic theories of the first three decades of the twentieth century played a central role. Since then, interest in the area has continued, but for the last few decades at a slower rate. While other areas of the new physics—such as the general theory of relativity—have attracted much attention, only relatively (...)
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  23.  24
    The Solar Element: A Reconsideration of Helium's Early History.Helge Kragh - 2009 - Annals of Science 66 (2):157-182.
    Apart from hydrogen, helium is the most abundant chemical element in the universe, and yet it was only discovered on the Earth in 1895. Its early history is unique because it encompasses astronomy as well as chemistry, two sciences which the spectroscope brought into contact during the second half of the nineteenth century. In the modest form of a yellow spectral line known as D3, ‘helium’ was sometimes supposed to exist in the Sun's atmosphere, an idea which is traditionally ascribed (...)
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  24.  5
    An Institute for Dollars: Physical Chemistry in Copenhagen Between the World Wars.Anita Kildebaek Nielsen & Helge Kragh - 1997 - Centaurus 39 (4):311-331.
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  25. Between Physics and Chemistry: Helmholtz's Route to a Theory of Chemical Thermodynamics.Helge Kragh - 1993 - In David Cahan (ed.), Hermann von Helmholtz and the Foundations of Nineteenth-Century Science. University of California Press. pp. 403--431.
  26.  42
    Adolfo Bartoli and the Problem of Radiant Heat.Bruno Carazza & Helge Kragh - 1989 - Annals of Science 46 (2):183-194.
    In 1876 the Italian physicist and physical chemist Adolfo Bartoli discussed a thought experiment in which he connected the second law of thermodynamics with the hypothetical pressure of radiation. Bartoli's work, published in Italian, exerted some influence on the subsequent development of black-body theory and light pressure research. This influence was mainly due to Boltzmann, who came to the Stefan-Boltzmann radiation law via a reworking of Bartoli's thought experiment. However, contrary to what is usually assumed, Bartoli was himself reluctant to (...)
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  27.  10
    Conceptual Changes in Chemistry: The Notion of a Chemical Element, Ca. 1900–1925.Helge Kragh - 2000 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 31 (4):435-450.
  28. Anatomy of a Priority Conflict: The Case of Element 72.Helge Kragh - 1980 - Centaurus 23 (4):275-301.
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  29.  4
    Naturens Tankelaeser: En Biografi Om Hans Christian Ørsted - by Dan Ch. Christensen.Helge Kragh - 2010 - Centaurus 52 (3):260-262.
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  30.  4
    Science and Religion, 400 BC?AD 1550: From Aristotle to Copernicus - by Edward Grant and Science and Religion, 1450?1900: From Copernicus to Darwin - by Richard G. Olson. [REVIEW]Helge Kragh - 2007 - Centaurus 49 (2):181-182.
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  31.  53
    The First Subatomic Explanations of the Periodic System.Helge Kragh - 2001 - Foundations of Chemistry 3 (2):129-143.
    Attempts to explain the periodic system as a manifestation of regularities in the structure of the atoms of the elements are as old as the system itself. The paper analyses some of the most important of these attempts, in particular such works that are historically connected with the recognition of the electron as a fundamental building block of all matter. The history of the periodic system, the discovery of the electron, and ideas of early atomic structure are closely interwoven and (...)
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  32.  11
    Arthur March, Werner Heisenberg, and the Search for a Smallest Length/Arthur March, Werner Heisenberg, Et la Notion de Longueur Minimale.Helge Kragh - 1995 - Revue d'Histoire des Sciences 48 (4):401-434.
  33. The Electrical Universe: Grand Cosmological Theory Versus Mundane Experiments.Helge Kragh - 1997 - Perspectives on Science 5:199-231.
  34.  3
    From Here to Eternity. Ernst Haeckel and Scientific Faith - by Mario A. Di Gregorio.Helge Kragh - 2007 - Centaurus 49 (3):246-247.
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  35.  1
    The Concept of the Monopole. A Historical and Analytical Case-Study.Helge Kragh - 1981 - Studies in History and Philosophy of Science Part A 12 (2):141.
  36.  4
    A Sense of History: History of Science and the Teaching of Introductory Quantum Theory.Helge Kragh - 1992 - Science & Education 1 (4):349-363.
  37.  15
    Before Cosmophysics: E.A. Milne on Mathematics and Physics.Helge Kragh & Simon Rebsdorf - 2002 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 33 (1):35-50.
    This paper examines the thoughts and early career of the astrophysicist and cosmologist E. A. Milne. Although Milne only turned to cosmology in 1932, many of the ideas that characterised his heterodox system of world physics can be traced back to his works from the 1920s. Contrary to what has been stated in the literature, we argue that Milne was familiar with and interested in cosmology even before 1932. The relationship between mathematics and physics, an important topic in Milne's cosmophysics, (...)
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  38.  11
    S. M. Jørgensen And His Controversy With A. Werner: A Reconsideration.Helge Kragh - 1997 - British Journal for the History of Science 30 (2):203-219.
    The controversy between Alfred Werner and Sophus Mads Jørgensen over the structure of complex inorganic compounds is not among the best known of the many controversies in the history of chemistry, but it is one of the most thoroughly described in the historical literature. This is due almost solely to the works of George Kauffman, the distinguished American historian of chemistry and specialist in the history of coordination chemistry. Kauffman has described and analysed almost every aspect of the development of (...)
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  39.  9
    Mathematics and Physics: The Idea of a Pre-Established Harmony.Helge Kragh - 2015 - Science & Education 24 (5-6):515-527.
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  40.  10
    Remarks on the Historiography and Philosophy of Modern Cosmology.Helge Kragh - 1997 - Danish Yearbook of Philosophy 32:65.
  41.  35
    Book Review: The Historical Development of Quantum Theory, Volume 6: The Completion of Quantum Mechanics 1926–1941. By Jagdish Mehra and Helmut Rechenberg. Springer, New York, 2000, Xxxvi + 1612 Pp., $149.00 (Hardcover). [REVIEW]Helge Kragh - 2002 - Foundations of Physics 32 (1):187-189.
  42.  5
    From Time Atoms to Space-Time Quantization: The Idea of Discrete Time, Ca 1925–1936.Helge Kragh & Bruno Carazza - 1994 - Studies in History and Philosophy of Science Part A 25 (3):437-462.
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  43. The Beginning of the World: Georges Lemaître and the Expanding Universe.Helge Kragh - 1987 - Centaurus 30 (2):114-139.
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  44.  21
    A Review of Rinat M.Nugayev's Book "Reconstruction of Mature Theory Change: A Theory-Change Model". [REVIEW]Rinat M. Nugayev & Helge Kragh - 2001 - Centaurus 43 (2):132-133.
    The aim of this book, written by a researcher at the Tatarstan Academy of Sciences, is to examine how and why theories change in science. Nugayev’s analysis, and his many examples, are confined to mathematically formalized theories of physics. Nugayev’s ideas are inspired by, and relate to, Russian scholars. His approach is primarily philosophical and clearly in the analytical tradition of Popper, Kuhn, Lakatos, Feyerabend, Stegmuller and others. Although Nugayev’s book is primarily addressed to philosophers, it is also of interest (...)
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  45.  2
    Before Quantum Chemistry: Erich Huckel and the Physics-Chemistry Interface.Helge Kragh - 2001 - Centaurus 43 (1):1-16.
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  46.  2
    Commentary 01 on Lilley 1953 and Truesdell 1970.Helge Kragh - 2008 - Centaurus 50 (1-2):19-20.
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  47.  2
    Styles of Science and Engineering: The Case of Early Long-Distance Telephony.Helge Kragh - 2009 - Centaurus 51 (3):175-188.
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  48.  14
    Wissenschaftlicher Briefwechsel MIT Bohr, Einstein, Heisenberg U.A. Volume 3: 1940-1949. Wolfgang Pauli, Karl von Mayenn. [REVIEW]Helge Kragh - 1996 - Isis 87 (1):196-196.
  49.  10
    Testability and Epistemic Shifts in Modern Cosmology.Helge Kragh - 2014 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 46 (1):48-56.
    During the last decade new developments in theoretical and speculative cosmology have reopened the old discussion of cosmology's scientific status and the more general question of the demarcation between science and non-science. The multiverse hypothesis, in particular, is central to this discussion and controversial because it seems to disagree with methodological and epistemic standards traditionally accepted in the physical sciences. But what are these standards and how sacrosanct are they? Does anthropic multiverse cosmology rest on evaluation criteria that conflict with (...)
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  50.  15
    Philosophy of Physics: Space and Time.Helge Kragh - 2015 - The European Legacy 20 (2):191-192.
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