Cosmology Forum

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Join in expert discussion on topics revolving around cosmology. Cosmology is the origin, evolution, structure and eventual fate of the universe.
If the universe is getting colder, wouldn't this violate the 2nd Law?
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A Place Where Gravity and Dark Energy Equalize
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Big bang and small bang black holes
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An apology and thoughts on the cost of experimental cosmology
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Is There a Definable Centre of the Universe?
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Unpacking the Concept of Time: What Do We Really Mean By It?
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Do Gravity Waves Contribute to Gravitational Curvature?
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Best way for a layman to get up to speed on cosmology outside of school
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Why do we and the entire universe exist?
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How Did Our Universe Begin: A Cycle of Creation or a New Dimension?
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Re-Poll: We are in a Schwarzschild black hole-T or F?
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Time and Space: What Came First?
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What Can We Expect from the Very Early Universe Meeting at Cambridge?
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Dark energy and the first law of thermodynamics
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Expanding Universe: Empty Space, Gas Mass & Galactic Expansion
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Superclusters and Voids - same curvature?
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Why does time seem to exist only in a forward direction?
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2nd law of thermodynamics and the big bang
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How Could the Universe Be Smaller Than a Proton?
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Universal Acceleration and Boltzmann Brains
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Can BigBang Happen Without a Vacuum?
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Can Pressure Explain the Accelerating Expansion of the Universe?
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Lambda-CDM model and geometric units
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No Dark Energy: Hubble Constant & Astrophysics
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Cosmology Challenges: Dark Matter, Dark Energy, Galaxy Formation
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How is the Inflation theory going?
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Are high-z SNe Ia data reliable for measuring the evolution of dark energy?
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The Big Bang theory, and gravity
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How do we know the universe isn't collapsing ?
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It all began with an end - New theory on origin and future of the universe
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Is the Universe Expanding Into Nothing?
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Uploading minds into a simulated universe
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Big Bang Theory Self-Contradictory?
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Will wormholes go away (be found to be a quirk of the theory) or. ?
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The Density Parameter and R^3 Space
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Could there be an edge to the Universe?
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  • Poll Poll
Which is simpler and easier to imagine?
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The void: Imprint of another universe?
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Galaxies in filaments; a different evolution?
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What Caused the Big Bang and Where Did It All Begin?
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Has observing the universe sealed its fate?
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What Surprising Discoveries Await in the Multiverse?
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Seeing is different than believing
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Uncovering the Mystery of the First Three Seconds in the Big Bang
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What Are the Key Controversies in Understanding the Big Bang Theory?
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Are there an infinite number of copies of the solar system?
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Can We Detect or Interact with Alternate Universes with Different Physical Laws?
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Hubble parameter in early universe
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  • Poll Poll
What Evidence is Needed to Confirm Dark Energy's Existence?
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Bounce replaces bang: articles in *Nature Physics*
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Is the Universe Moving? Acceleration or Stationary?
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Understanding Orbital Period: Definition, Factors, and Calculation
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What keeps the atmosphere of a planet in place?
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Is the Age of the Universe Linked to the Big Bang Event?
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God the Computer; The Universe's Code
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Age of Universe: T=1/H, Flat Geometry?
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Understanding the Closed Universe: The Expansion and Contraction of Space
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If observing the universe affects its duration ? (recent Krauss Dent paper)
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Evidence of Deccelerating Universe Through History
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Neutrinos in Nature: Estimating Numbers
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Unraveling the Mystery of the Expanding Universe
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What Are the Key Insights from Friedmann Cosmology's Standard Model?
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WMAP tend to coincide with radio emissions from the Milky Way
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The MAXIMUM size of the universe
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Does Gravitational Radiation Exist?
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Critique of Mainstream Cosmology
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The Big Bang and the Mysteries of the Expanding Universe
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  • Poll Poll
Is there an unambiguous 'Dark Energy' signal in the relevant astronomical data?
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What Lies Beyond the Edge of the Universe?
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Please recommend books for layperson?
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Is the Evidence for Dark Energy Secure?
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G from cosmological measurements
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What is the elusive origin of gravity?
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What Is the Universe's Topology According to Recent Research?
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Which Books Are Best for Beginners in Cosmology?
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Singularity/Expanding Universe questions
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Starting in Cosmology: Understanding the Role of Physics and GR
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Fusion in the Sun: Neutrons or Neutrinos – What is Produced?
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Discussing Arp's Cosmology: Issues & Evidence
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Solving the Dispute: Criticism of Hartle-Hawking Model Explained
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The Mystery of the Origin of the Universe: Perspectives and Theories Explored
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Upper limit on the rest mass of neutrinos if. .
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Questioning the big bang theory.
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Is the Universe Actually a Cosmic Computer?
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Photon Energy vs. Red Shift, Inflation Theory, Acceleration
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Meaning of cosmological constant ?
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Does the Big Bang Theory Break Down at the Planck Time?
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Hubble's Redshift: Conclusions and Vacuum Solutions
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How Can We See the Universe's Past if We Are Made from It?
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Does the Confusing Supernova Challenge the Big Bang Theory?
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Is the Big Bang Theory a Foolhardy Extrapolation?
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Big Bang and the Second Law of Thermodynamics
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Can Future Civilizations Harness Entropy to Survive in an Expanding Universe?
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What is the ultimate fate of the universe?
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Friedmann Cosmology at T < 1 second
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What Does Expanding Universe Mean?
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Universe expansion -> t = - inifinite
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Another hawking radiation question
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Gravity & Big Bang: Can Matter Escape Its Own Pull?
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Can a Photon's Energy Approach Zero?
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Cosmology

Cosmology is the scientific study of the large-scale structure, origin, evolution, and ultimate fate of the universe. It seeks to understand the fundamental nature of the cosmos, including the distribution of galaxies, dark matter, dark energy, and the overall geometry of space-time. Cosmologists explore the early moments of the universe, moments after the Big Bang, and employ various observational tools, such as telescopes and satellites, to gather data that informs our understanding of cosmic evolution.

Key concepts in cosmology include the expansion of the universe, cosmic microwave background radiation, and the formation of galaxies and large-scale structures. It is a field that intersects with physics, astronomy, and astrophysics, providing insights into the vast and intricate tapestry of the cosmos.

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