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Category: cosmology – Page 42

Two AIs Discuss: The Construct of Science, a Metaphysical Inquiry!

“Metaphysical Experiments: Physics and the Invention of the Universe” by Bjørn Ekeberg Book Link: https://amzn.to/4imNNk5

“Metaphysical Experiments, Physics and the Invention of the Universe,” explores the intricate relationship between physics and metaphysics, arguing that fundamental metaphysical assumptions profoundly shape scientific inquiry, particularly in cosmology. The author examines historical developments from Galileo and Newton to modern cosmology and particle physics, highlighting how theoretical frameworks and experimental practices are intertwined with philosophical commitments about the nature of reality. The text critiques the uncritical acceptance of mathematical universality in contemporary physics, suggesting that cosmology’s reliance on hypological and metalogical reasoning reveals a deep-seated faith rather than pure empirical validation. Ultimately, the book questions the limits and implications of a science that strives for universal mathematical truth while potentially overlooking its own inherent complexities and metaphysical underpinnings. Chapter summaries:
- Cosmology in the Cave: This chapter examines the Large Hadron Collider (LHC) in Geneva to explore the metaphysics involved in the pursuit of a “Theory of Everything” linking subatomic physics to cosmology.
- Of God and Nature: This chapter delves into the seventeenth century to analyze the invention of the universe as a concept alongside the first telescope, considering the roles of Galileo, Descartes, and Spinoza.
- Probability and Proliferation: This chapter investigates the nineteenth-century shift in physics with the rise of probabilistic reasoning and the scientific invention of the particle, focusing on figures like Maxwell and Planck.
- Metaphysics with a Big Bang: This chapter discusses the twentieth-century emergence of scientific cosmology and the big bang theory, shaped by large-scale science projects and the ideas of Einstein and Hawking.
- Conclusion: This final section questions the significance of large-scale experiments like the JWST as metaphysical explorations and reflects on our contemporary scientific relationship with the cosmos.

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Scientists improve gravitational wave identification with machine learning

A study published in Physical Review Letters outlines a new approach for extracting information from binary systems by looking at the entire posterior distribution instead of making decisions based on individual parameters.

Since their detection in 2015, have become a vital tool for astronomers studying the early universe, the limits of general relativity and cosmic events such as compact .

Binary systems consist of two massive objects, like neutron stars or black holes, spiraling toward each other. As they merge together, they generate ripples in spacetime—gravitational waves—which give us information about both objects.

600,000 times bigger than our Sun, a hidden black hole is moving closer to our galaxy

Astronomers have recently identified a colossal black hole lurking in the shadows of our cosmic neighborhood. This celestial giant, estimated to be 600,000 times more massive than our Sun, resides in the Magellanic Clouds and is gradually approaching the Milky Way. The discovery has sparked significant interest among scientists who are now contemplating the potential consequences of an eventual collision between our galaxy and this massive cosmic entity.

A team of researchers from the Harvard & Smithsonian Center for Astrophysics has detected compelling evidence of a supermassive black hole within the Magellanic Clouds. These findings, published in The Astrophysical Journal on April 7, 2025, reveal a cosmic giant that dwarfs our Sun by a factor of 600,000 in terms of mass. The black hole’s enormous gravitational influence has long remained hidden from direct observation.

The Magellanic Clouds consist of two satellite galaxies orbiting our Milky Way at a distance of approximately 160,000 light-years. Their gradual approach toward our galaxy suggests an eventual merger that could dramatically reshape our cosmic neighborhood. Scientists are particularly concerned about the fate of this newly discovered black hole during such a collision event.

Quantum Maze!? The Supermaze Hypothesis Explained!

Are black holes really cosmic shredders—or are they complex quantum structures storing everything they consume? Discover the revolutionary Supermaze Hypothesis and Fuzzball Theory in this deep dive into black hole physics, quantum mechanics, and string theory. This could change everything we know about the universe!

Paper link : https://arxiv.org/abs/2312.

Chapters:
00:00 Introduction.
00:44 Inside the Supermaze – A New Perspective from String Theory.
02:42 The Fuzzball Revolution – Solving the Information Paradox.
04:43 Scientific Debate and the Road to the Theory of Everything.
06:57 Outro.
07:16 Enjoy.

MUSIC TITLE: Starlight Harmonies.

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Dark matter could make planets spin faster

Dark matter is a confounding concept that teeters on the leading edges of cosmology and physics. We don’t know what it is or how exactly it fits into our understanding of the universe. We only know that its unseen mass is a critical part of the cosmos.

Astronomers know dark matter exists. They can tell by the way galaxies rotate, by exploiting gravitational lensing, and by analyzing fluctuations in the Cosmic Microwave Background. But new research suggests that there might be another way to detect its presence.

The research is “Dark Matter (S)pins the Planet,” and it’s available on the arXiv preprint server. Haihao Shi, from the Xinjiang Astronomical Observatory at the Chinese Academy of Sciences, is the lead author. The co-authors are all from Chinese research institutions.

Stephen Hawking’s final paper bursts the multiverse bubble with a Holographic Universe theory

Renowned physicist Stephen Hawking passed away earlier this year, but his legacy to science will live on. His final theory on the origin of the universe has now been published, and it offers an interesting departure from earlier ideas about the nature of the “multiverse.”

Ideas about how the universe came to exist the way we see it today have been adapted and built on for decades. The new paper, authored by Hawking and Professor Thomas Hertog, adds to the literature with a new understanding of a theory known as eternal inflation.

After the Big Bang kickstarted the universe, it expanded exponentially for a brief fraction of a fraction of a second. When that inflationary period ended, the universe continued to expand at a much slower rate. But according to the eternal inflation model, quantum fluctuations mean that in some regions of the universe, that rapid inflation never stopped. That results in a gigantic “background” universe full of an infinite number of smaller pocket universes – including the one we live in.

CMS finds unexpected excess of top quarks

The CMS collaboration at CERN has observed an unexpected feature in data produced by the Large Hadron Collider (LHC), which could point to the existence of the smallest composite particle yet observed. The result, reported at the Rencontres de Moriond conference in the Italian Alps this week, suggests that top quarks – the heaviest and shortest lived of all the elementary particles – can momentarily pair up with their antimatter counterparts to produce an object called toponium. Other explanations cannot be ruled out, however, as the existence of toponium was thought too difficult to verify at the LHC, and the result will need to be further scrutinised by CMS’s sister experiment, ATLAS.

High-energy collisions between protons at the LHC routinely produce top quark–antiquark pairs (tt-bar). Measuring the probability, or cross section, of tt-bar production is both an important test of the Standard Model of particle physics and a powerful way to search for the existence of new particles that are not described by the 50-year-old theory. Many of the open questions in particle physics, such as the nature of dark matter, motivate the search for new particles that may be too heavy to have been produced in experiments so far.

CMS researchers were analysing a large sample of tt-bar production data collected in 2016–2018 to search for new types of Higgs bosons when they spotted something unusual. Additional Higgs-like particles are predicted in many extensions of the Standard Model. If they exist, such particles are expected to interact most strongly with the singularly massive top quark, which weighs in at 184 times the mass of the proton. And if they are massive enough to decay into a top quark–antiquark pair, this should dominate the way they decay inside detectors, with the two massive quarks splintering into “jets” of particles.

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