Ontology of Gravitational Singularities

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Peter Bokulich and Erik Curiel (Curiel and Bokulich 2018) assert that general relativity (GR) allows singularities, and that we need to understand the ontology of singularities if we want to understand the nature of space and time in the present … Read More

Gravitational Singularities

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Within the classical theory of Newton’s gravity there is the fundamental possibility of singularity. No signal can propagate from within a singularity, but its gravitational influence is permanently present externally and depends only on the total mass, the angular momentum, … Read More

Psychology of the film Solaris directed by Andrei Tarkovsky

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Tarkovski’s film is a drama of pain and partial recovery centered on the psychology of the Solaris station crew. Tarkovski wanted to address this way the deeply emotional and intellectual science-fantastic genre, considered by him to be superficial. The film … Read More

The future of eugenics

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The potential use of genetic engineering has brought back past eugenics into bioethics disputes. There are opinions, such as those of Nicholas Agar, according to which non-coercive eugenics programs are inherently ethical. (Fletcher and Wertz 1990) Adherents of liberal eugenics … Read More

Newton-Hooke controversy in the opinion of scientists

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A presentation of Hooke’s 1674 monograph introducing the idea of universal gravity was included in the Philosophical Transactions (Royal Society 1775) and subsequently several letters containing observations, including one of Huygens. But obviously, after the publication of Principia in 1687, … Read More

The Ontology of General Relativity

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In classical vision, space and time are containers; matter is the content. The distinctive property of matter is that it carries energy and impulse, preserved over time, resulting in energy and impulse being fundamental ontologically. (Norton 2012) General Relativity (GR) … Read More

Science and pseudoscience – Falsifiability

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The delimitation between science and pseudoscience is part of the more general task of determining which beliefs are epistemologically justified. Science can be described as partly descriptive, partly normative. A definition of science can focus on descriptive content and specify … Read More

Grandfather paradox in time travel

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(Top: original billiard ball trajectory. Middle: the billiard ball emerges from the future, and delivers its past self a strike that averts the past ball from entering the time machine. Bottom: the billiard ball never enters the time machine, giving … Read More

Classical theory of singularities

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Nicolae Sfetcu Email: nicolae@sfetcu.com The singularities from the general relativity resulting by solving Einstein’s equations were and still are the subject of many scientific debates: Are there singularities in spacetime, or not? Big Bang was an initial singularity? If singularities … Read More

Hooke’s claim on the law of gravity

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Since ancient times, Aristotle has represented the universe as transparent concentric spheres, with the Earth in the center, then, outwardly, the spheres of the Moon, the planets, and the fixed stars. But he did not try to give any explanation … Read More

Newton’s action at a distance – Different views

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Different authors have attempted to clarify the aspects of remote action and God’s involvement on the basis of textual investigations, mainly from the Mathematical Principles of Natural Philosophy, (Newton, 1999b) Newton’s correspondence with Richard Bentley (1692/93), (Bentley 1693) and Queries … Read More

Time Travel

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Time travel involves traveling in a time different from the present, in the past or in the future, basically without a space travel with reference to a local coordinate system. Time travel can be made by a material body that … Read More

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