Newton about God’s role in gravity

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Isaac Newton’s mechanics is based on a theology: his God is a geometer and an architect who has known how to combine the materials of the system in such a way that result a stable state of equilibrium and a … Read More

Newton’s thought on celestial mechanics and its diffusion

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Let us indicate, in its essential features, the change of mind produced by the prodigious success and by the diffusion of Newton’s celestial mechanics: at the beginning of the 18th century, a sort of Cartesian orthodoxy reigned almost everywhere in … Read More

Isaac Newton on the action at a distance in gravity: With or without God?

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The interpretation of Isaac Newton’s texts has sparked controversy to this day. One of the most heated debates relates to the action between two bodies distant from each other (the gravitational attraction), and to what extent Newton involved God in … Read More

Principia: The Mathematical Principles of Natural Philosophy (Annotated), by Isaac Newton

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The English-language print edition of the most famous scientific book of all time has been published on Amazon: “Principia: The Mathematical Principles of Natural Philosophy (Annotated)”, by Isaac Newton Paperback Edition and Hardcover Edition: https://www.amazon.com/dp/B09M5LJZND For digital versions (PDF, EPUB … Read More

Heuristics of String Theory

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The logical positivists would have considered string theory as a speculative metaphysics. The instrumentalist aspect of logical positivism does not correspond with the opinions of string theorists. From the point of view of Popper’s falsifiability, [1] we clearly distinguish between … Read More

Epistemology of String Theory in Quantum Gravity

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In quantum field theory, the main obstacle is the occurrence of the untreatable infinities in the interactions of the particles due to the possibility of arbitrary distances between the point particles. Strings, as extended objects, provide a better framework, which … Read More

Epistemology of Canonical Quantum Gravity – Loop Quantum Gravity

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In the interpretation of canonical quantum gravity (CQG), gravity appears as a geometric pseudoforce, is reduced to spacetime geometry and becomes a simple effect of spacetime curvature. [1] (Maudlin[2]). Lehmkuhl[3] argues that canonical formalism does not confirm this interpretation. General … Read More

Heuristics and Tests of Quantum Gravity

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Heuristics of quantum gravity For the attempt to create a gravitational quantum theory, there are several research programs, some of which became obsolete over time due to the higher heuristic power of other programs. J. Butterfield thus distinguishes three major … Read More

Epistemology of Quantum Gravity

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Recent decades indicate “a blurring of distinction between physical science and mathematical abstraction … [reflecting] a growing tendency to accept, and in some cases ignore, serious testability problems.” [1] Oldershaw lists dozens of major non-testing issues in the pre-instrumentalist era. … Read More

Cosmological Tests of Gravity

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The current cosmological models are built based on general relativity. The solutions of the specific equations, Friedmann-Lemaître-Robertson-Walker, [1] allow to model the evolution of the universe starting from the Big Bang.[2] Some of the parameters of the universe have been … Read More

Strong Field Gravitational Tests

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When the density of the body becomes large enough, general relativity predicts the formation of a black hole. The neutron stars of about 1.4 solar masses and the black holes are the final stage for the evolution of the massive … Read More

Modern Tests of Relativistic Gravitational Theories

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Dicke and Schiff established a framework for testing general relativity, [1] including through null experiments and using the physics of space exploration, electronics and condensed matter, such as the Pound-Rebka experiment and laser interferometry. The gravitational lens tests and the … Read More

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