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1. www.britannica.com › biography › Edwin-HubbleEdwin Hubble | Biography, Discoveries, Education, & Facts

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   May 17, 2024 · Summarize This Article. Edwin Hubble (born November 20, 1889, Marshfield, Missouri, U.S.—died September 28, 1953, San Marino, California) was an American astronomer who played a crucial role in establishing the field of extragalactic astronomy and is generally regarded as the leading observational cosmologist of the 20th century.

   • Galaxy

     Galaxy, any of the systems of stars and interstellar matter...

   • Richard C. Tolman

     Richard C. Tolman was a U.S. physical chemist and physicist...

   • Astronomy

     Astronomy is the study of objects and phenomena beyond...

2. Videos

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     What is Cosmology?

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     Cosmology Lecture 1

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     Cosmology Lecture 10

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3. en.wikipedia.org › wiki › Hubble's_lawHubble's law - Wikipedia

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   2 days ago · Hubble's law, also known as the Hubble–Lemaître law, [1] is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance. In other words, the farther they are, the faster they are moving away from Earth.

4. en.wikipedia.org › wiki › Lambda-CDM_modelLambda-CDM model - Wikipedia

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   2 days ago · The Lambda-CDM, Lambda cold dark matter, or ΛCDM model is a mathematical model of the Big Bang theory with three major components: a cosmological constant, denoted by lambda (Λ), associated with dark energy. the postulated cold dark matter, denoted by CDM. ordinary matter. It is referred to as the standard model of Big Bang cosmology [1 ...

5. arxiv.org › abs › 2406[2406.01669] Algebraic Observational Cosmology - arXiv.org

   arxiv.org › abs › 2406

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   2 days ago · What can be measured by an observer in our universe? We address this question by constructing an algebra of gravitationally-dressed observables accessible to a comoving observer in FLRW spacetimes that are asymptotically de Sitter in the past, describing an inflationary epoch. An essential quantized degree of freedom is the zero-mode of the inflaton, which leads to fluctuations in the ...

6. arxiv.org › abs › 2405[2405.13680] Five parameters are all you need (in $Λ$CDM)

   arxiv.org › abs › 2405

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   May 22, 2024 · The standard cosmological model, with its six independent parameters, has proven remarkably successful in describing the evolution of the Universe. One of these parameters, the optical depth to reionization $τ_{\\mathrm{reio}}$, represents the scatterings that Cosmic Microwave Background (CMB) photons will experience after decoupling from the primordial plasma as the intergalactic medium ...

7. visual.gsfc.nasa.gov › astrophysics › cosmologyObservational Cosmology Laboratory - visual.gsfc.nasa.gov

   visual.gsfc.nasa.gov › astrophysics › cosmology

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   May 20, 2024 · Too much and too little water: Using hydrometeorological modeling to characterize and understand water extremes Dr. Mimi Hughes, Research Meteorologist, NOAA’s Physical Sciences Laboratory

8. People also ask

   Which cosmological model best describes the evolution of the universe?

   • The standard cosmological model, with its six independent parameters, has proven remarkably successful in describing the evolution of the Universe.

   [2405.13680] Five parameters are all you need (in $Λ$CDM) - arXiv.org

   arxiv.org/abs/2405.13680

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   Why is cosmology important?

   • Concerned with phenomena on the largest scale is cosmology, the study of the evolution of the universe. Astrophysics has transformed cosmology from a purely speculative activity to a modern science capable of predictions that can be tested. Nickel-iron meteorite, from Canyon Diablo, Arizona.

   Astronomy | Definition, History, Discoveries, & Facts | Britannica

   www.britannica.com/science/astronomy

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   Why is cosmology complicated over long periods of time?

   • Over long periods of time, the dynamics are complicated by general relativity, dark energy, inflation, etc., as explained above. The Hubble length or Hubble distance is a unit of distance in cosmology, defined as — the speed of light multiplied by the Hubble time. It is equivalent to 4,420 million parsecs or 14.4 billion light years.

   Hubble's law - Wikipedia

   en.wikipedia.org/wiki/Hubble's_law

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   Do violations of the cosmological principle exist?

   • However, recent findings have suggested that violations of the cosmological principle, especially of isotropy, exist. These violations have called the ΛCDM model into question, with some authors suggesting that the cosmological principle is obsolete or that the Friedmann–Lemaître–Robertson–Walker metric breaks down in the late universe.

   Lambda-CDM model - Wikipedia

   en.wikipedia.org/wiki/Lambda-CDM_model

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