The Dissemination of Einstein's Theory of Time Through

Total Page:16

File Type:pdf, Size:1020Kb

The Dissemination of Einstein's Theory of Time Through THE DISSEMINATION OF EINSTEIN’S THEORY OF TIME THROUGH PRINT, 1905-1979 A Thesis Presented to The Graduate Faculty of The University of Akron In Partial Fulfillment of the Requirements for the Degree Master of Arts Lonny Young August, 2007 THE DIS SEMINATION OF EINSTEIN’S THEORY OF TIME THROUGH PRINT, 1905-1979 Lonny Young Thesis Approved: Accepted: _________________________________ _________________________________ Advisor Dean of the College Dr. Kevin Kern Dr. Ronald F. Levant _________________________________ _________________________________ Faculty Reader Dean of the Graduate School Dr. Elizabeth Mancke Dr. George R. Newkome _________________________________ _________________________________ Department Chair Date Dr. Walter Hixson ii TABLE OF CONTENTS Page LIST OF FIGURES .............................................................................................................v CHAPTER I. INTRODUCTION ...........................................................................................................1 The Physics Behind Time ........................................................................................2 Newton’s Absolute Time .........................................................................................3 The Establishment and Crisis of the Ether ...............................................................4 Special Relativity .....................................................................................................7 General Relativity ..................................................................................................12 The Resistance to Einstein and Relativity .............................................................15 General Overview ..................................................................................................17 Limitations .............................................................................................................21 II. COLLEGE PHYSICS TEXTBOOKS AND POPULAR BOOKS ..............................23 Textbooks for Physical Science Majors .................................................................27 Textbooks for Non-Physical Science Majors ........................................................37 General Analysis ....................................................................................................45 Popular Books........................................................................................................52 Conclusion .............................................................................................................56 III. MAGAZINES .............................................................................................................58 Science ...................................................................................................................62 Time ........................................................................................................................73 iii General Analysis ....................................................................................................82 IV. NEWSPAPERS ..........................................................................................................86 Letters to the Editor ...............................................................................................90 General Articles .....................................................................................................97 Book Reviews ......................................................................................................105 Editorials ..............................................................................................................109 General Analysis ..................................................................................................109 V. CONCLUSION ..........................................................................................................114 BIBLIOGRAPHY ............................................................................................................122 APPENDIX ......................................................................................................................128 iv LIST OF F IGURES Figure Page 1-1 View of laser from on board train ..........................................................................10 1-2 View of laser on train from ground........................................................................10 1-3 Time dilation equation ...........................................................................................12 1-4 The Equivalence Principle .....................................................................................13 1-5 Clocks on a rotating plane ......................................................................................14 2-1 Chart for the Analysis of Textbooks for Physical Science Majors ........................36 2-2 Chart for the Analysis of Textbooks for Non-Physical Science Majors ................44 3-1 Analysis of Magazine Articles in Science and Time ..............................................83 4-1 Appearances of Relativity in the New York Times .................................................88 4-2 Number of Expressions of Difficulty, Support, Resistance, Explanation, and Combinations Thereof in Letters to the Editor in the New York Times, 1910-1979 ..............................................................................................................91 4-3 The Number of Letters to the Editor That Discussed Time ...................................96 4-4 The Number of General Articles That Discussed Time .........................................99 4-5 Number of Expressi ons of Difficulty, Support, Resistance, Explanation, and Combinations Thereof in News Articles in the New York Times, 1910-1979 ............................................................................................................102 4-6 Number of Expressions of Difficulty, Support, Resistance, Explanation, and Interest in Book Reviews in the New York Ti mes, 1910-1979......................107 4-7 The Number of Book Reviews That Discussed Time .........................................108 v CHAPTER I INTRODUCTION For what is time? Who can readily and briefly e xplain this? Who can even in thought comprehend it, so as to utter a word about it? But what in discourse do we me ntion more familiarly and knowingly, than time? And, we understand, when we speak of it; we u nderstand also, when we hear it spoken of by another. What then is time? If no one asks me, I know: if I wish to explain it to one that asketh, I know not: yet I say boldly that I know, that if nothing passed away, time past were not; and if nothing were coming, a time to come were not; and if nothing were, time present were not. 1 “For what is time?” This question was posed by St. Augustine of Hippo over 1,500 years ago, yet many still struggle to find the answer. Natural philosophers and sc i- entists have also struggled to find an answer for many years. Some have used the hea v- ens as a way of answering this question, while others have turned to philosophy. Many of the current theories about time come from the realm of physics, and in these theories, time can behave strangely. Despite widespread publication of the latest theories and co n- ceptions of time in textbooks, magazine and newspaper articles, a nd popular books, few people know of them, much less understand them. Instead, most people u nderstand time as they experience it; uniform and u nstoppable. In other words, time is absolute. Time does not begin, end, or change for man or god. It is infin ite, yet flee ting, fast but slow. Above all, time simply is. 1 St. Augustine of Hippo, Confessi ons , trans. E. B. Pusey (New York: E. P. Dutton & Co., 1907), 262. 1 The concept of absolute time ruled science for over 2,200 years. Even now, abso- lute time “is what most people would take to be the common sense view.” 2 The reason that so many people hold ab solute time to be the common sense view is that it approxi- mates everyday experience so well. In fact, even the most extreme circu mstances –such as space flight–in which humans can currently place themselves, absolute time still a p- pears to hold. Currently , it is only in the realm of particle physics, in which particles travel near the speed of light, that scientists begin to o bserve time behaving in ways that do not seem to be normal. The Physics Behind Time While the Greek philosopher Aristotle was the fi rst to put forth the idea of abso- lute time, Sir Isaac Newton best and most completely developed the view that “one could unamb iguously measure the interval of time between two events and that this time would be the same whoever measured it provided the per son used a good clock.”3 Many scie n- tists up to the twentieth century considered the Newtonian view of absolute time as d e- finitive b ecause it corresponded so well with everyday experience. No one could a rgue that time was anything other than constant b eca use of the complete inability to challenge the convention established by Aristotle and c emented by Newton. The tec hnology to confirm or refute a bsolute time did not exist until the invention of the atomic clock nearly 250 years after Newton published his Principia . Fu rthermore, since no person could travel at speeds that would cause a measurable time dilation, no one could seriously co n- template or defend the idea that time was anything but absolute; the experience necessary 2 Stephen Hawking and Leonard
Recommended publications
  • A Mathematical Derivation of the General Relativistic Schwarzschild
    A Mathematical Derivation of the General Relativistic Schwarzschild Metric An Honors thesis presented to the faculty of the Departments of Physics and Mathematics East Tennessee State University In partial fulfillment of the requirements for the Honors Scholar and Honors-in-Discipline Programs for a Bachelor of Science in Physics and Mathematics by David Simpson April 2007 Robert Gardner, Ph.D. Mark Giroux, Ph.D. Keywords: differential geometry, general relativity, Schwarzschild metric, black holes ABSTRACT The Mathematical Derivation of the General Relativistic Schwarzschild Metric by David Simpson We briefly discuss some underlying principles of special and general relativity with the focus on a more geometric interpretation. We outline Einstein’s Equations which describes the geometry of spacetime due to the influence of mass, and from there derive the Schwarzschild metric. The metric relies on the curvature of spacetime to provide a means of measuring invariant spacetime intervals around an isolated, static, and spherically symmetric mass M, which could represent a star or a black hole. In the derivation, we suggest a concise mathematical line of reasoning to evaluate the large number of cumbersome equations involved which was not found elsewhere in our survey of the literature. 2 CONTENTS ABSTRACT ................................. 2 1 Introduction to Relativity ...................... 4 1.1 Minkowski Space ....................... 6 1.2 What is a black hole? ..................... 11 1.3 Geodesics and Christoffel Symbols ............. 14 2 Einstein’s Field Equations and Requirements for a Solution .17 2.1 Einstein’s Field Equations .................. 20 3 Derivation of the Schwarzschild Metric .............. 21 3.1 Evaluation of the Christoffel Symbols .......... 25 3.2 Ricci Tensor Components .................
    [Show full text]
  • Philosophy and the Physicists Preview
    L. Susan Stebbing Philosophy and the Physicists Preview il glifo ebooks ISBN: 9788897527466 First Edition: December 2018 (A) Copyright © il glifo, December 2018 www.ilglifo.it 1 Contents FOREWORD FROM THE EDITOR Note to the 2018 electronic edition PHILOSOPHY AND THE PHYSICISTS Original Title Page PREFACE NOTE PART I - THE ALARMING ASTRONOMERS Chapter I - The Common Reader and the Popularizing Scientist Chapter II - THE ESCAPE OF SIR JAMES JEANS PART II - THE PHYSICIST AND THE WORLD Chapter III - ‘FURNITURE OF THE EARTH’ Chapter IV - ‘THE SYMBOLIC WORLD OF PHYSICS’ Chapter V - THE DESCENT TO THE INSCRUTABLE Chapter VI - CONSEQUENCES OF SCRUTINIZING THE INSCRUTABLE PART III - CAUSALITY AND HUMAN FREEDOM Chapter VII - THE NINETEENTH-CENTURY NIGHTMARE Chapter VIII - THE REJECTION OF PHYSICAL DETERMINISM Chapter IX - REACTIONS AND CONSEQUENCES Chapter X - HUMAN FREEDOM AND RESPONSIBILITY PART IV - THE CHANGED OUTLOOK Chapter XI - ENTROPY AND BECOMING Chapter XII - INTERPRETATIONS BIBLIOGRAPHY INDEX BACK COVER Susan Stebbing 2 Foreword from the Editor In 1937 Susan Stebbing published Philosophy and the Physicists , an intense and difficult essay, in reaction to reading the works written for the general public by two physicists then at the center of attention in England and the world, James Jeans (1877-1946) and Arthur Eddington (1882- 1944). The latter, as is known, in 1919 had announced to the Royal Society the astronomical observations that were then considered experimental confirmations of the general relativity of Einstein, and who by that episode had managed to trigger the transformation of general relativity into a component of the mass and non-mass imaginary of the twentieth century.
    [Show full text]
  • From Relativistic Time Dilation to Psychological Time Perception
    From relativistic time dilation to psychological time perception: an approach and model, driven by the theory of relativity, to combine the physical time with the time perceived while experiencing different situations. Andrea Conte1,∗ Abstract An approach, supported by a physical model driven by the theory of relativity, is presented. This approach and model tend to conciliate the relativistic view on time dilation with the current models and conclusions on time perception. The model uses energy ratios instead of geometrical transformations to express time dilation. Brain mechanisms like the arousal mechanism and the attention mechanism are interpreted and combined using the model. Matrices of order two are generated to contain the time dilation between two observers, from the point of view of a third observer. The matrices are used to transform an observer time to another observer time. Correlations with the official time dilation equations are given in the appendix. Keywords: Time dilation, Time perception, Definition of time, Lorentz factor, Relativity, Physical time, Psychological time, Psychology of time, Internal clock, Arousal, Attention, Subjective time, Internal flux, External flux, Energy system ∗Corresponding author Email address: [email protected] (Andrea Conte) 1Declarations of interest: none Preprint submitted to PsyArXiv - version 2, revision 1 June 6, 2021 Contents 1 Introduction 3 1.1 The unit of time . 4 1.2 The Lorentz factor . 6 2 Physical model 7 2.1 Energy system . 7 2.2 Internal flux . 7 2.3 Internal flux ratio . 9 2.4 Non-isolated system interaction . 10 2.5 External flux . 11 2.6 External flux ratio . 12 2.7 Total flux .
    [Show full text]
  • Coordinates and Proper Time
    Coordinates and Proper Time Edmund Bertschinger, [email protected] January 31, 2003 Now it came to me: . the independence of the gravitational acceleration from the na- ture of the falling substance, may be expressed as follows: In a gravitational ¯eld (of small spatial extension) things behave as they do in a space free of gravitation. This happened in 1908. Why were another seven years required for the construction of the general theory of relativity? The main reason lies in the fact that it is not so easy to free oneself from the idea that coordinates must have an immediate metrical meaning. | A. Einstein (quoted in Albert Einstein: Philosopher-Scientist, ed. P.A. Schilpp, 1949). 1. Introduction These notes supplement Chapter 1 of EBH (Exploring Black Holes by Taylor and Wheeler). They elaborate on the discussion of bookkeeper coordinates and how coordinates are related to actual physical distances and times. Also, a brief discussion of the classic Twin Paradox of special relativity is presented in order to illustrate the principal of maximal (or extremal) aging. Before going to details, let us review some jargon whose precise meaning will be important in what follows. You should be familiar with these words and their meaning. Spacetime is the four- dimensional playing ¯eld for motion. An event is a point in spacetime that is uniquely speci¯ed by giving its four coordinates (e.g. t; x; y; z). Sometimes we will ignore two of the spatial dimensions, reducing spacetime to two dimensions that can be graphed on a sheet of paper, resulting in a Minkowski diagram.
    [Show full text]
  • The Theory of Relativity and Applications: a Simple Introduction
    The Downtown Review Volume 5 Issue 1 Article 3 December 2018 The Theory of Relativity and Applications: A Simple Introduction Ellen Rea Cleveland State University Follow this and additional works at: https://engagedscholarship.csuohio.edu/tdr Part of the Engineering Commons, and the Physical Sciences and Mathematics Commons How does access to this work benefit ou?y Let us know! Recommended Citation Rea, Ellen. "The Theory of Relativity and Applications: A Simple Introduction." The Downtown Review. Vol. 5. Iss. 1 (2018) . Available at: https://engagedscholarship.csuohio.edu/tdr/vol5/iss1/3 This Article is brought to you for free and open access by the Student Scholarship at EngagedScholarship@CSU. It has been accepted for inclusion in The Downtown Review by an authorized editor of EngagedScholarship@CSU. For more information, please contact [email protected]. Rea: The Theory of Relativity and Applications What if I told you that time can speed up and slow down? What if I told you that everything you think you know about gravity is a lie? When Albert Einstein presented his theory of relativity to the world in the early 20th century, he was proposing just that. And what’s more? He’s been proven correct. Einstein’s theory has two parts: special relativity, which deals with inertial reference frames and general relativity, which deals with the curvature of space- time. A surface level study of the theory and its consequences followed by a look at some of its applications will provide an introduction to one of the most influential scientific discoveries of the last century.
    [Show full text]
  • Lemaître and Hoyle: Contrasting Characters in Science and Religion
    S & CB (2012), 24, 111–127 0954–4194 RODNEY HOLDER Lemaître and Hoyle: Contrasting Characters in Science and Religion Georges Lemaître was a jocular Roman Catholic priest and Fred Hoyle a bluff Yorkshireman who despised organised religion. Both were giants of twentieth century cosmology but espoused diametrically opposed cosmological models. This paper explores the extent to which ideology, and particularly religion, played a part in the controversies over the Big Bang and steady-state theories. A significant problem for many cosmologists, including Hoyle, was posed by the idea that the universe had a temporal beginning: an eternal, unchanging universe seemed metaphysically preferable. And Hoyle was highly polemical about religion in his popular writings. In contrast, Lemaître saw no theological import from the Big Bang, and never entered a debate about its theological implications until, perhaps unexpectedly, he took issue with an address given by the Pope. Hoyle’s seminal work on stellar nucleosynthesis led him to speak of a ‘superintellect monkeying with physics’ though this was never identified with the God of classical theism. The work of both Lemaître and Hoyle resonates with more recent debates concerning cosmology. Key words: Lemaître, Hoyle, Big Bang, steady-state theory, cosmology, creation Introduction In Georges Lemaître and Fred Hoyle we have two characters who are so utterly different in many ways, yet who shared one very significant attrib- ute: they were giants in twentieth century cosmology and astrophysics. In short, here we have a Belgian Roman Catholic priest who can rightly be described as the Father of the Big Bang, and in Hoyle an atheist York- shireman who pioneered the alternative of a steady-state universe with neither beginning nor end.
    [Show full text]
  • The 29 of May Or Sir Arthur and The
    International Journal of Management and Applied Science, ISSN: 2394-7926 Volume-4, Issue-4, Apr.-2018 http://iraj.in THE 29TH OF MAY OR SIR ARTHUR AND THE BENDING LIGHT (TEACHING SCIENCE AND LITERATURE JOINTLY) MICHAEL KATZ Faculty of Education, Haifa University, Mount Carmel, Haifa, Israel E-mail: [email protected] Abstract - In this paper I present an instance illustrating a program of joint teaching of science and literature. The instance sketched here rests on recognition that at the age when children read books like Kästner's "The 35th of May" they can already taste notions of Relativity Theory through the story of Eddington's expedition to Principe Island. Eddington's story is briefly recounted here with references to Kästner's book. The relationships thus exhibited between science and fiction, fantasy and reality, theory and actuality, humor and earnestness, should help evoke school age children's interest in science and literature at early stages in their studies' endeavor. Keywords - Bending Light, Fantasy, Gravitation, Relativity, Science and Literature. I. INTRODUCTION South Seas" – a story of adventure and humor by Erich Kästner, the well known German author of The idea that teaching science and humanities in more than a few dearly loved novels, mostly for primary and secondary schools needn't necessarily be children and adolescents. The book was first seen as disjoint objectives is prevalent in the thought published in German in 1931 and in English shortly and practice of more than a few scholars and teachers after. in recent years. Carole Cox [1], for example, unfolds forty strategies of literature based teaching of various Twelve years earlier, in 1919, another journey topics in arts and sciences.
    [Show full text]
  • Equivalence Principle (WEP) of General Relativity Using a New Quantum Gravity Theory Proposed by the Authors Called Electro-Magnetic Quantum Gravity Or EMQG (Ref
    WHAT ARE THE HIDDEN QUANTUM PROCESSES IN EINSTEIN’S WEAK PRINCIPLE OF EQUIVALENCE? Tom Ostoma and Mike Trushyk 48 O’HARA PLACE, Brampton, Ontario, L6Y 3R8 [email protected] Monday April 12, 2000 ACKNOWLEDGMENTS We wish to thank R. Mongrain (P.Eng) for our lengthy conversations on the nature of space, time, light, matter, and CA theory. ABSTRACT We provide a quantum derivation of Einstein’s Weak Equivalence Principle (WEP) of general relativity using a new quantum gravity theory proposed by the authors called Electro-Magnetic Quantum Gravity or EMQG (ref. 1). EMQG is manifestly compatible with Cellular Automata (CA) theory (ref. 2 and 4), and is also based on a new theory of inertia (ref. 5) proposed by R. Haisch, A. Rueda, and H. Puthoff (which we modified and called Quantum Inertia, QI). QI states that classical Newtonian Inertia is a property of matter due to the strictly local electrical force interactions contributed by each of the (electrically charged) elementary particles of the mass with the surrounding (electrically charged) virtual particles (virtual masseons) of the quantum vacuum. The sum of all the tiny electrical forces (photon exchanges with the vacuum particles) originating in each charged elementary particle of the accelerated mass is the source of the total inertial force of a mass which opposes accelerated motion in Newton’s law ‘F = MA’. The well known paradoxes that arise from considerations of accelerated motion (Mach’s principle) are resolved, and Newton’s laws of motion are now understood at the deeper quantum level. We found that gravity also involves the same ‘inertial’ electromagnetic force component that exists in inertial mass.
    [Show full text]
  • Revised Theory of Gravity Doesn't Predict a Big Bang 12 July 2010, by Lisa Zyga
    Revised theory of gravity doesn't predict a Big Bang 12 July 2010, By Lisa Zyga decades he became more interested in finding a theory to unify gravity and quantum mechanics - a task that is still being studied today. In 1924, Eddington proposed a new “gravitational action” as an alternative to the Einstein-Hilbert action, which could serve as an alternative starting point to general relativity. In astrophysics, a gravitational action is the mechanism that describes how gravity can emerge from space-time being curved by matter and energy. However, Eddington’s theory of gravity only worked for empty space and didn’t Illustration: Time Line of the Universe Credit: include any source of energy such as matter, NASA/WMAP making it an incomplete theory. Since Eddington’s proposal, scientists have attempted various ways of including matter into the (PhysOrg.com) -- The Big Bang theory has formed theory, although they have run into problems. In the basis of our understanding of the universe's this study, Banados and Ferreira have tried a new origins since it was first proposed in 1927 by way to extend the theory to include matter by using Georges Lemaitre. And for good reason: the theory a gravitational action called the Born-Infeld action. is supported by scientists' latest observations and experiments, and is based on Einstein's widely In their analysis, the scientists found that a key accepted theory of general relativity. But scientists characteristic of Eddington’s revised theory of are always on the lookout for any evidence that gravity is that it reproduces Einstein gravity might suggest an alternative to the Big Bang.
    [Show full text]
  • Eddington, Lemaître and the Hypothesis of Cosmic Expansion in 1927
    Eddington, Lemaître and the hypothesis of cosmic expansion in 1927 Cormac O’Raifeartaigh School of Science and Computing, Waterford Institute of Technology, Cork Road, Waterford, Ireland Author for correspondence: [email protected] 1 1. Introduction Arthur Stanley Eddington was one of the leading astronomers and theorists of his generation (Smart et al. 1945; McCrea 1982; Chandrasekhar, S. 1983). An early and important proponent of the general theory of relativity, his 1918 ‘Report on the Relativity Theory of Gravitation’ for the Physical Society (Eddington 1918) provided an early authoritative exposition of the subject for English-speaking physicists (Vibert Douglas 1956 p42; Chandrasekhar 1983 p24). He played a leading role in the eclipse observations of 1919 that offered early astronomical evidence in support of the theory (Vibert Douglas 1956 pp 39-41; Chandrasekhar 1983 pp 24- 29; Kennefick, this volume) while his book ‘Space, Time and Gravitation’ (Eddington 1920) was one of the first popular treatises on general relativity for an English-speaking audience. In addition, Eddington’s textbook ‘The Mathematical Theory of Relativity’ (Eddington 1923) became a classic reference for English-speaking physicists with an interest in relativity (McCrea 1982; Chandrasekhar 1983 p32). Indeed, the book provided one of the first textbook accounts of relativistic models of the cosmos, complete with a discussion of possible links to one of the greatest astronomical puzzles of the age, the redshifts of the spiral nebulae (Eddington 1923 pp 155-170). It seems therefore quite surprising that, when Eddington’s former student Georges Lemaître suggested in a seminal article of 1927 (Lemaître 1927) that a universe of expanding radius could be derived from general relativity, and that the phenomenon could provide a natural explanation for the redshifts of the spiral nebulae, Eddington (and others) paid no attention.
    [Show full text]
  • PPN Formalism
    PPN formalism Hajime SOTANI 01/07/2009 21/06/2013 (minor changes) University of T¨ubingen PPN formalism Hajime Sotani Introduction Up to now, there exists no experiment purporting inconsistency of Einstein's theory. General relativity is definitely a beautiful theory of gravitation. However, we may have alternative approaches to explain all gravitational phenomena. We have also faced on some fundamental unknowns in the Universe, such as dark energy and dark matter, which might be solved by new theory of gravitation. The candidates as an alternative gravitational theory should satisfy at least three criteria for viability; (1) self-consistency, (2) completeness, and (3) agreement with past experiments. University of T¨ubingen 1 PPN formalism Hajime Sotani Metric Theory In only one significant way do metric theories of gravity differ from each other: ! their laws for the generation of the metric. - In GR, the metric is generated directly by the stress-energy of matter and of nongravitational fields. - In Dicke-Brans-Jordan theory, matter and nongravitational fields generate a scalar field '; then ' acts together with the matter and other fields to generate the metric, while \long-range field” ' CANNOT act back directly on matter. (1) Despite the possible existence of long-range gravitational fields in addition to the metric in various metric theories of gravity, the postulates of those theories demand that matter and non-gravitational fields be completely oblivious to them. (2) The only gravitational field that enters the equations of motion is the metric. Thus the metric and equations of motion for matter become the primary entities for calculating observable effects.
    [Show full text]
  • Edward Milne's Influence on Modern Cosmology
    ANNALS OF SCIENCE, Vol. 63, No. 4, October 2006, 471Á481 Edward Milne’s Influence on Modern Cosmology THOMAS LEPELTIER Christ Church, University of Oxford, Oxford OX1 1DP, UK Received 25 October 2005. Revised paper accepted 23 March 2006 Summary During the 1930 and 1940s, the small world of cosmologists was buzzing with philosophical and methodological questions. The debate was stirred by Edward Milne’s cosmological model, which was deduced from general principles that had no link with observation. Milne’s approach was to have an important impact on the development of modern cosmology. But this article shows that it is an exaggeration to intimate, as some authors have done recently, that Milne’s rationalism went on to infiltrate the discipline. Contents 1. Introduction. .........................................471 2. Methodological and philosophical questions . ..................473 3. The outcome of the debate .................................476 1. Introduction In a series of articles, Niall Shanks, John Urani, and above all George Gale1 have analysed the debate stirred by Edward Milne’s cosmological model.2 Milne was a physicist we can define, at a philosophical level, as an ‘operationalist’, a ‘rationalist’ and a ‘hypothetico-deductivist’.3 The first term means that Milne considered only the observable entities of a theory to be real; this led him to reject the notions of curved space or space in expansion. The second term means that Milne tried to construct a 1 When we mention these authors without speaking of one in particular, we will use the expression ‘Gale and co.’ 2 George Gale, ‘Rationalist Programmes in Early Modern Cosmology’, The Astronomy Quarterly,8 (1991), 193Á218.
    [Show full text]