Hipparchus Star CataloguesIn this article I discuss the fragments of Hipparchus' star catalogue and compare them to Hipparchus' Exegesis to trace the early history of stellar catalogues in Greek astronomy.Francesca Schironi·Oct 25, 2024SaveLearn
Quantum Probabilities Are Objective Degrees of Epistemic JustificationQBism is currently one of the most widely discussed 'subjective' interpretations of quantum mechanics. Its key move is to say that quantum probabilities are personalist Bayesian probabilities and…Philipp Berghofer·Oct 24, 2024SaveLearn
Transient Phenomena of MercuryThe similarity of Mercury to the Moon raises the question on mercurian analogues of lunar transient phenomena. However, since the mid-1960s, this topic has remained out of attention. Nevertheless,…Oleksiy Arkhypov·Oct 23, 2024SaveLearn
Fusion divided: what prevented European collaboration on controlled thermonuclear fusion in 1958The European Organization for Nuclear Research (CERN) in Geneva is renowned for operating the world`s largest particle accelerator and is often regarded as a model of high-profile international…Barbara Hof·Oct 21, 2024SaveLearn
What Emergence Can Possibly MeanWe consider emergence from the perspective of dynamics: states of a system evolving with time. We focus on the role of a decomposition of wholes into parts, and attempt to characterize relationships…Sean M. Carroll, Achyuth Parola·Oct 20, 2024SaveLearn
Moderate Physical PerspectivalismRecent developments in foundations of physics have given rise to a class of views suggesting that physically meaningful descriptions must always be relativized to a physical perspective. In this…Emily Adlam·Oct 17, 2024SaveLearn
What Reference Frames Teach Us. Part I: About Symmetry Principles and ObservabilityThis paper is an exploration of the nuanced realm of reference frames within the framework of General Relativity. Our analysis exposes a violation of Earman's SP1 principle in scenarios involving…Nicola Bamonti, Henrique Gomes·Oct 16, 2024SaveLearn
Bounds on the rates of growth and convergence of all physical processesThe upper limit on what is computable in our universe is unknown, but widely believed to be set by the Turing machine -- with a function being physically computable if and only if it is…Toby Ord·Oct 14, 2024SaveLearn
Implications of Tarski's Undefinability Theorem on the Theory of EverythingThe Theory of Everything (SToE) seeks to unify all fundamental forces of nature, including quantum gravity, into a single theoretical framework. This theory would be defined internally…Mir Faizal, Arshid Shabir, Aatif Kaisar Khan·Oct 13, 2024SaveLearn
The Quantum Master and its Classical EmissaryIan McGilchrist's works present the thesis that the two hemispheres of the brain have radically different modes of interacting with the world, and that their respective perceptions and functions must…R. E. Kastner·Oct 13, 2024SaveLearn
GPS Observables in Newtonian Spacetime or Why We Do Not Need 'Physical' Coordinate SystemsSome authors have defended the claim that one needs to be able to define 'physical coordinate systems' and 'observables' in order to make sense of general relativity. Moreover, in Rovelli (Physical…Álvaro Mozota Frauca·Oct 11, 2024SaveLearn
Distribution can be Dropped: Reply to RumfittMost believe that there are no empirical grounds that make the adoption of quantum logic necessary. Ian Rumfitt has further argued that this adoption is not possible, either, for the proof that…Iulian D. Toader·Oct 9, 2024SaveLearn
How do we Observe Relational Observables?In theories with a diffeomorphism symmetry, such as general relativity and canonical quantum gravity, it is often proposed that the empirical content is encoded in relational observables. But how do…Emily Adlam·Oct 7, 2024SaveLearn
What is a physical theory? Philosophers do have an answer by distinguishing two forms of empirical adequacyWhat is a physical theory? Although this intriguing question has been addressed from many different perspectives, some physicists and philosophers of physics have implicitly or explicitly embraced a…Jorge Manero·Oct 6, 2024SaveLearn
Nowruz, Umar Khayyam, Calendar and ConstellationsThis article provides information about the factors that necessitated the need to adjust the calendar during the time of Umar Khayyam, the method of choosing the beginning of the year, and the length…Rizoi Bakhromzod·Oct 5, 2024SaveLearn
The Fear of Halley's Comet Visit in 1910 is Preserved in a Cave in Southern Puerto RicoThis paper explores a unique cave art found in southern Puerto Rico that depicts a comet over a tomb. Through interdisciplinary methods, including art interpretation, historical documentation, and…Abel Méndez, Ángel Acosta-Colón·Oct 4, 2024SaveLearn
Hume's dictum as a guide to ontologyIn this paper I aim to defend one version at least of Hume's dictum: roughly, the idea that possibility is determined by ontology through something like independent variation. My defence is broadly…Adam Caulton·Oct 3, 2024SaveLearn
Book Review: 'Background Independence in Classical and Quantum Gravity', by James ReadThis is a review of James Read's insightful book, Background Independence in Classical and Quantum Gravity. The book introduces various notions of background-independence which it then makes precise,…Sebastian De Haro·Oct 1, 2024SaveLearn
Evaluating Jacob Bernoulli's Ship Propulsion Artifice: Euler's Analysis and CritiqueThe present work examines and compares the approaches of Jacob Bernoulli and Leonhard Euler to the problem of ship propulsion generated by internal forces. Jacob Bernoulli's analysis, developed in…Sylvio R. Bistafa·Sep 30, 2024SaveLearn
A translation of L. Euler's " Examination of an artifice for propelling a ship by the principle of internal motion"The following translation of Leonhard Euler's "Examination of an Artifice for Propelling a Ship by the Principle of Internal Motion," originally published in 1750, offers a glimpse into a fascinating…Sylvio R. Bistafa·Sep 30, 2024SaveLearn
Spacetime emergence: an (in)effective storyPhysicists and philosophers are increasingly prone to regarding our current physical theories as providing 'effective descriptions' of real-world systems. In the context of quantum gravity research,…Mike D. Schneider·Sep 30, 2024SaveLearn
Thermodynamics without TimeOur fundamental theories, i.e., the quantum theory and general relativity, are invariant under time reversal. Only when we treat system from the point of view of thermodynamics, i.e., averaging…Francesca Vidotto·Sep 27, 2024SaveLearn
Majorana and the bridge between matter and anti-matterThis short essay aims to offer a discursive presentation of three scientific articles by Ettore Majorana highlighting the fundamental importance of one of them - the last one - for the investigation…Francesco Vissani·Sep 26, 2024SaveLearn
1930-1937: the first β-rays and neutrino theoriesThe conceptual bases of Fermi's β-ray theory (at its 90th anniversary) are examined, highlighting the innovative drive and inspirational role for the progress that followed just afterwards.…Francesco Vissani·Sep 26, 2024SaveLearn
Music, Immortality, and the SoulMusic has been called the temporal art par excellence. Yet, as this paper explains, it is also the atemporal art par excellence. The contradiction is, however, only apparent, and a result of viewing…Dean Rickles·Sep 20, 2024SaveLearn