This essay was published in the September 2023 edition of Griffith Observer. It is an examination of the curious friendship between writer Aldous Huxley and astronomer Edwin Hubble and its philosophical basis: empiricism. I hope that by consideration of these two thinker''s lives and work light may be shed on each of their ideas and on the 20th century conceptions of empiricism more broadly.

We have had the chance to live through a fascinating revolution in measuring the fundamental empirical cosmological Hubble law. The key progress is analysed: improvement of observational means ; understanding of the biases that affect both distant and local determinations of the Hubble constant; new theoretical and observational results. These circumstances encourage us to take a critical look at some facts and ideas related to the cosmological red-shift. This is important because we are probably on the eve of (...) a new understanding of our Universe, heralded by the need to interpret some cosmological key observations in terms of unknown processes and substances. (shrink)

The paper presents and discusses the Hubble tension with respect to recent results in cosmology. I shall argue that the measurements from the James Webb Space Telescope and TRGB stars calibrations allow us to infer that the estimates of H0 with late universe methods are robust. Building on from robustness analysis, I conclude that the resolution of the tension cannot be expected to come from new systematics, but rather from new physics.

The vivid, dramatic images of distant stars and galaxies taken by the Hubble Space Telescope have come to define how we visualize the cosmos. In their immediacy and vibrancy, photographs from the Hubble show what future generations of space travelers might see should they venture beyond our solar system. But their brilliant hues and precise details are not simply products of the telescope's unprecedented orbital location and technologically advanced optical system. Rather, they result from a series of deliberate (...) decisions made by the astronomers who convert raw data from the Hubble into spectacular pictures by assigning colors, adjusting contrast, and actively composing the images, balancing the desire for an aesthetically pleasing representation with the need for a scientifically valid one. In Picturing the Cosmos, Elizabeth A. Kessler examines the Hubble's deep space images, highlighting the remarkable resemblance they bear to nineteenth-century paintings and photographs of the American West and their invocation of the visual language of the sublime. Drawing on art history and the history of science, as well as interviews with astronomers who work on the Hubble Heritage Project, Kessler traces the ways that the sublime, with its inherent tension between reason and imagination, not only forms the appearance of the images, but also operates on other levels. The sublime informs the dual expression—numeric and pictorial—of digital data and underpins the relevance of the frontier for a new era of exploration performed by our instruments rather than our bodies. Through their engagement with the sublime the Hubble images are a complex act of translation that encourages an experience of the universe as simultaneously beyond humanity's grasp and within the reach of our knowledge. Strikingly illustrated with full-color images, this book reveals the scientific, aesthetic, and cultural significance of the Hubble pictures, offering a nuanced understanding of how they shape our ideas—and dreams—about the cosmos and our places within it. (shrink)

Cosmologists take the $\Lambda$CDM model to be a permanent contribution to our knowledge of the universe, based on the success of precision cosmology. Consistent, independent determinations of the parameters in this model encourage physicists to take it seriously. This stance incurs an obligation to resolve any discrepancies by reanalyzing measurements or adding further complexity. Recent observations in cosmology indicate a tension between “local” and “global” determinations of the Hubble constant. Here I argue that this tension illustrates one of the (...) benefits of taking the model seriously and consider the challenges to making a case for the permanence of $\Lambda$CDM. (shrink)

We argue that the epistemic functions of replication in science are best understood by their role in assessing kinds of experimental error. Direct replications serve to assess the reliability of an experiment through its precision: the presence and degree of random error. Conceptual replications serve to assess the validity of an experiment through its accuracy: the presence and degree of systematic errors. To illustrate the aptness of this view, we examine the Hubble constant controversy in astronomy, showing how astronomers (...) have responded to the concordances and discordances in their results by carrying out the different kinds of replication that we identify, with the aim of establishing a precise, accurate value for the Hubble constant. We contrast our view with Machery’s “re-sampling” account of replicability, which maintains that replications only assess reliability. (shrink)

In this column I want to focus on three things. First, the nature of the HST problem, its origins, and its cure. Second some observations on the difference between scientific funding agencies (in particular, DOE and NASA) in dealing with scientific megaprojects (i.e., any scientific project costing over $100 million). Finally, I want to offer a modest proposal for fixing our ailing national space program.

Measuring the rate at which the universe expands at a given time–the ‘Hubble constant’– has been a topic of controversy since the first measure of its expansion by Edwin Hubble in the 1920s. As early as the 1970s, Sandage and de Vaucouleurs have been arguing about the adequate methodology for such a measurement. Should astronomers focus only on their best indicators, e.g., the Cepheids, and improve the precision of this measurement based on a unique object to the best (...) possible? Or should they “spread the risks”, i.e., multiply the indicators and methodologies before averaging over their results? Is a robust agreement across several uncertain measures, as is currently argued to defend the existence of a ‘Hubble crisis’ more telling than a single 1% precision measurement? This controversy, I argue, stems from a misconception of what managing the uncertainties associated with such experimental measurements require. Astrophysical measurements, such as the measure of the Hubble constant, require a methodology that permits both to reduce the known uncertainties and to track the unknown unknowns. Based on the lessons drawn from the so-called Hubble crisis, I sketch a methodological guide for identifying, quantifying and reducing uncertainties in astrophysical measurements, hoping that such a guide can not only help to re-frame the current Hubble tension, but serve as a starting point for future fruitful discussions between astrophysicists, astronomers and philosophers. (shrink)

Seen | Unseen is a richly illustrated, analysis of the interconnections between science and the visual arts as Martin Kemp explores the responses of artists, scientists and their instruments, to the world. From Leonardo, Durer and the inventors of photography to contemporary sculptors, and from Galileo and Darwin to Stephen J. Gould, Kemp considers the way in which scientists and artists have perceived the world and responded to its patterns.

New Cosmic Horizons was written by a project manager, originally trained as a physicist, who worked in the European space world and in business for about twenty‐five years and then returned to academia to complete his Ph.D. It is a well‐written, comprehensive compilation of major scientific results in space astronomy obtained during the latter half of the twentieth century. As the book jacket explains, “it explores the triumphs of space experiments and spacecraft designs and the amazing astronomical results that they (...) have produced.” It is particularly useful because it does not just concentrate on American contributions in this area, as important as they have been, but tries to redress the transatlantic balance by including scientific work in the Soviet Union and Europe, notably the European Space Agency. The blurb claims that David Leverington relates the changes in space astronomy programs in these various countries to their “changing political imperatives.” This is done very sketchily, however, and merely by way of a backdrop to his main objective.Practicing astronomers, be they amateur or professional, and historians of science who could use a survey of the major milestones in space astronomy will find this a useful guide. It is seriously marred as a reference work, however, by the total absence of any reference to primary or secondary material in the text. There is a bibliography of what Leverington calls “general sources used in the preparation of this book” , which includes standard histories of space and of space science. None of these books, nor any scientific papers, are cited in the body of the argument. Everything that is said, or claimed, has to be taken on the authority of the author, an extraordinary approach that can only undermine and discredit what was otherwise a laudable objective. (shrink)

This article explores the relation between two different modes of cosmology: the social and the scientific. Over the twentieth century, scientific understandings of the dimensions and operations of the physical universe changed dramatically, significantly prompted by astronomical and astrophysical research undertaken at the Mount Wilson Observatory in Pasadena, California. Could those understandings be readily translated into social theory? Studies across a range of disciplines have intimated that the scientific cosmos might be less essential to the worlds of meaning and belonging (...) that people and communities compose around themselves than more local and relational models of an ordered whole. The article applies that proposition to the Mount Wilson Observatory itself, arguing that the observatory’s founder, George Ellery Hale, and his acolytes were deeply invested in practices of terrestrial place-making, the politics of belonging, and the cadences of civilizational time as applied to their city and its region. Moreover, they struggled to construct a philosophy integrating the cosmos they were seeking to fix at home with the contortions and careering trajectories of the universal whole. (shrink)

Keywords: extrasolar planets Hubble telescope occulter apodization life oxygen Published in the March-2007 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 10/17/2006 and is copyrighted ©2006 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Kurt Gödel, mathematician and logician, was one of the most influential thinkers of the twentieth century. Gödel fled Nazi Germany, fearing for his Jewish wife and fed up with Nazi interference in the affairs of the mathematics institute at the University of Göttingen. In 1933 he settled at the Institute for Advanced Study in Princeton, where he joined the group of world-famous mathematicians who made up its original faculty. His 1940 book, better known by its short title, The Consistency of (...) the Continuum Hypothesis, is a classic of modern mathematics. The continuum hypothesis, introduced by mathematician George Cantor in 1877, states that there is no set of numbers between the integers and real numbers. It was later included as the first of mathematician David Hilbert's twenty-three unsolved math problems, famously delivered as a manifesto to the field of mathematics at the International Congress of Mathematicians in Paris in 1900. In The Consistency of the Continuum Hypothesis Gödel set forth his proof for this problem. In 1999, Time magazine ranked him higher than fellow scientists Edwin Hubble, Enrico Fermi, John Maynard Keynes, James Watson, Francis Crick, and Jonas Salk. He is most renowned for his proof in 1931 of the 'incompleteness theorem,' in which he demonstrated that there are problems that cannot be solved by any set of rules or procedures. His proof wrought fruitful havoc in mathematics, logic, and beyond. (shrink)

In previous publications I have argued that much scientific activity should be thought of as involving the operation of distributed cognitive systems. Since these contributions to the cognitive study of science appear in venues not necessarily frequented by philosophers of science, I begin with a brief introduction to the notion of a distributed cognitive system. I then describe what I take to be an exemplary case of a scientific distributed cognitive system, the Hubble Space Telescope (HST). I do not (...) here reargue the case for conceiving of systems like the HST as distributed cognitive systems. Rather, I examine a question that arises once one has adopted the perspective of distributed cognitive systems, namely, the role of agency in a distributed cognitive system. Here I argue, contrary to several advocates of distributed cognitive systems, that we should regard the human components of distributed cognitive systems as the only sources of agency within such systems. In particular, we should not extend notions of agency to such systems as a whole. (shrink)

From the perspective of cognitive science, it is illuminating to think of much contemporary scientific research as taking place in distributed cognitive systems. This is particularly true of large-scale experimental and observational systems such as the Hubble Telescope. Clark, Hutchins, Knorr-Cetina, and Latour insist or imply such a move requires expanding our notions of knowledge, mind, and even consciousness. Whether this is correct seems to me not a straightforward factual question. Rather, the issue seems to be how best to (...) develop a theoretical understanding of such systems appropriate to the study of science and technology. I argue that there is no need to attribute to such systems as a whole any form of cognitive agency. We can well understand the importance of such systems while restricting agency to the human components. The implication is that we think of these large-scale distributed cognitive systems not so much as unified wholes, but as hybrid systems including both physical artifacts and ordinary humans. (shrink)

It is proposed to remove the difficulty of nonitegrability of length in the Weyl geometry by modifying the law of parallel displacement and using “standard” vectors. The field equations are derived from a variational principle slightly different from that of Dirac and involving a parameter σ. For σ=0 one has the electromagnetic field. For σ<0 there is a vector meson field. This could be the electromagnetic field with finite-mass photons, or it could be a meson field providing the “missing mass” (...) of the universe. In cosmological models the two natural gauges are the Einstein gauge and the cosmic gauge. With the latter the universe has a fixed size, but the sizes of small systems decrease with time and their masses and energies increase, thus producing the Hubble effect. The field of a particle in this gauge is investigated, and it leads to an interesting solution of the Einstein equations that raises a question about the Schwarzschild solution. (shrink)

It has been known for long time that most of the existing cosmology models have singularity problem. Cosmological singularity has been a consequence of excessive symmetry of flow, such as “Hubble’s law”. More realistic one is suggested, based on Newtonian cosmology model but here we include the vertical-rotational effect of the whole Universe. We review a Riccati-type equation obtained by Nurgaliev, and solve the equation numerically with Mathematica. It is our hope that the new proposed method can be verified (...) with observation data. (shrink)

What constitutes a scientific discovery? What role do discoveries play in science, its dynamics and social practices? Must every discovery be attributed to an individual discoverer (or a small number of discoverers)? The paper explores these questions by first critically examining extant philosophical explications of scientific discovery—the models of scientific discovery, propounded by Kuhn, McArthur, Hudson, and Schindler. As a simple, natural and powerful alternative, we proffer the “change-driver model”: in a nutshell, it takes discoveries to be cognitive scientific results (...) that have epistemically advanced science. The model overcomes the shortcomings of its precursors, whilst preserving their insights. We demonstrate its intensional and extensional superiority, especially with respect to the link between scientific discoveries and the dynamics of science, as well as the award system of science. Both as an illustration, and as an application to a recent scientific and political controversy, we apply the considered models of discovery to one of the most momentous discoveries of science: the expansion of the universe. We oppose the 2018 proposal of the International Astronomers’ Union as too simplistic vis-`a-vis the historical complexity of the episode. The change- driver model yields a more nuanced and circumspect verdict: (i) The redshift-distance relation shouldn’t be named the “Hubble-Lemaître Law”, but “Slipher-Lundmark-Hubble-Humason Law”; (ii) Its interpretation in terms of an expanding universe, however, Lemaître ought to be given credit for; but (iii) The establishment of the expansion of the universe, as an evidentially sufficiently warranted result, is a communal achievement, emerging in the 1950s or 1960s. (shrink)

Today we know, and this will be the subject of this article, that the universe is in continuous evolution, even revolution. This observation has been possible only quite recently. It was necessary to wait for the observations of distant galaxies, undertaken between 1930 and 1950 by Edwin P. Hubble, the astronomer who was the first to show that the universe as a whole is presently expanding. We know now also that the form of the constellations closest to us, such (...) as the Great Bear, has been modified over the last millennia. Ancient astronomers, and with them the rest of humanity, imagined at that time that the universe was eternal and unchangeable. Astrophysicists today are convinced, in the large majority, that twenty billion years ago the universe went through a unique phase during which it was very hot and very dense. To this phenomenon they have given the name of the original or primordial explosion. As will be seen later, certain people believe that the universe will once again experience this great “heat”, which will be generated during future contractions. Others foresee an increasingly frozen and empty future for the universe. Between this glorious past and this uncertain future, the universe each day reveals more of its splendor thanks to the arrival of modern techniques of observation and the beginning of the conquest of space. The purpose of this article is to give a brief survey of the manner in which astronomers see the universe today; working from the position of man in the universe, his relation to it begins to be understood better. (shrink)

Under the assumption that Hubble's constant H0 is constant in cosmic time, there is an analogy between the equation of propagation of light and that of expansion of the universe. Using this analogy, and assuming that the laws of physics are the same at all cosmic times, a new special relativity, a cosmological relativity, is developed. As a result, a transformation is obtained that relates physical quantities at different cosmic times. In a one-dimensional motion, the new transformation is given (...) by $$x' = \frac{{x - Tv}}{{(1 - T^2 /T_0^2 )^{{1 \mathord{\left/ {\vphantom {1 2}} \right. \kern-\nulldelimiterspace} 2}} }},v' = \frac{{v - xT/T_0^2 }}{{(1 - T^2 /T_0^2 )^{{1 \mathord{\left/ {\vphantom {1 2}} \right. \kern-\nulldelimiterspace} 2}} }}$$ where x and v are the coordinate and velocity, T is the cosmic time measured backward with respect to our present time T=0, tand T0 is Hubble's time.Some consequences of this transformation are given, and its applicability limitation is pointed out. (shrink)

The extension of the method of science to the study of the astronomical universe as a whole is an impressive and important feature of recent intellectual history. In a field where previously myth and metaphysics ranged at will with speculative abandon but with little in the way of progressively cumulative information or insight, by contrast, scientific cosmology has already produced significant results of an observational sort and opened up vistas of disciplined theoretical vision that are a token of even more (...) extensive disclosures to come. With the aid of high-powered telescopes, observationally grounded descriptive generalizations have been established about the structure, distribution and motions of the bodies constituting the basic astronomical units out of which the universe is composed. Such units are, in contemporary investigations, identified as the extragalactic nebulae. Preliminary surveys revealed a uniformity of distribution of these nebulae throughout space and in all directions. Also original surveys, accomplished primarily by Hubble, suggested an empirical law stating a linear proportionality between the distances to nebulae and the red-shift in their spectra. If such red-shift is interpreted as a velocity effect, it may be taken as marking a mutual recession of nebulae from one another, and leads thereby to the general idea of an “expanding universe.' Meanwhile, theoretical cosmology in the hands of the mathematical physicists has kept pace with observational advances by offering a variety of ”models” or explanatory theoretical devices for the systematic ordering and incorporation of the fruits of observation. Beginning with the ground-breaking paper by Einstein in 1917 where an extension was made of relativistic principles to the cosmologic domain, a variety of further attempts were made along classical relativistic lines by Einstein himself, de Sitter, Robertson, Tolman and Lamaître while somewhat different modes of approach were subsequently opened in several directions by Milne, Eddington, Hoyle, and others. While nothing in the way of a stable or wholly acceptable theory has yet made its appearance, nevertheless fruitful and promising lines of research have thus been inaugurated. (shrink)

The Human Animal in Western Art and ScienceLeonardoLeonardo da Vinci: Experience, Experiment, and DesignSeen | Unseen: Art, Science, and Intuition from Leonardo to the Hubble Space Telescope by Martin Kemp; Martin Kemp; Martin Kemp; Martin Kemp.

A convention with regard to geometry, accepting nonholonomic aether motion and coordinate-dependent units, is always valid as an alternative to Einstein's convention. Choosing flat spacetime, Newtonian gravitation is extended, step by step, until equations closely analogous to those of Einstein's theory are obtained. The first step, demanded by considerations of inertia, is the introduction of a vector potential. Treating the electromagnetic and gravitational fields as real and imaginary components of a complex field (gravitational mass being treated as imaginary charge), the (...) Maxwell stress-momentum-energy tensor for the complex field is then used as the source for both fields. The spherically symmetric solution of these unified field equations describes the electron. Third, effects arising from motion of aether fluid with respect to the artificial reference systems of flat spacetime are included. On the grounds that attraction between likes and repulsion between likes are, a priori, equally possible, it is suggested that gravitational and electromagnetic phenomena should enjoy equal status. This can be achieved on the scale of an infinite cosmos by introducing a hierarchy of isolated systems, each of which is a universe when viewed internally and an elementary particle when viewed externally. A universe (defined by the Hubble radius), an electron, and a neutrino are three consecutive isolated systems of the hierarchy. Implied is the existence of antiuniverses where gravitational mass has opposite sign and antimatter predominates. Remarkable relationships between physical constants emerge. (shrink)