Tag: Max Tegmark

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astronomy Cosmology Physics

You’re not lost in a directionless universe

A news article in appeared in Science titled “It’s official: You’re lost in a directionless universe”1 where the author Adrian Cho reported on the results of a research paper published in Physical Review Letters in September 2016. That paper is available online as a preprint.2 In the online Science article the conclusion of the research is stated that

“For the first time, we really exclude anisotropy,” [the lead author] Saadeh says. “Before, it was only that it hadn’t been probed.”

universe_cmb
Top image: CMB temperature anisotropies map from Planck satellite. Bottom image: Simulated image from one of the models used where a preferred axis was introduced. Credits: (Top to bottom) ESA and the Planck Collaboration; D. Saadeh et. al., zenodo

The research involved simulations on a supercomputer where various forms of anisotropic structure and expansion of the universe were introduced in modelled universes. The authors looked for how those would affect any putative patterns that might be observed in the cosmic microwave background (CMB) radiation. The design was to see what would produce anisotropy in the CMB temperature data. See illustration to the right.

They found that none of the patterns they produced are observed in the CMB data from the Planck satellite. Ok, so that solves it! The Universe is isotropic and therefore the fundamental assumption for the big bang model—that is, matter is distributed uniformly throughout the Universe, on the largest scales–is correct and hence it validates the choice of the standard ΛCDM big bang model to describe the Universe. Well, no, not actually.

Firstly, for that to be true it would have to be assumed that the authors modelled all possible sources of anisotropy in the Universe. It would also have to be assumed that the patterns they generated in their modelled CMB temperature anisotropies were, in fact, indicative of large scale structure in the real Universe. There is no independent way to test that. All that researchers have available to them is supercomputer modelling. So how can you know what the Universe should look like with different types of anisotropic distributions of matter? There are no other universes available except this one, therefore we are always limited by this fundamental uncertainty.

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astronomy Belief in God Cosmology Creation/evolution History Physics Science

Review of “The Principle”

—a documentary by Rick deLano and Robert Sungenis

The Principle

A few years ago I was interviewed for this documentary “The Principle” that was to challenge the idea that the Cosmological Principle was wrong. That much I agreed with and still do. The planet Earth is in a special place in the Universe, which is not the same thing as being absolutely geocentric.

The documentary includes interviews largely with professional PhD physicists and one theologian.

I agreed to be interviewed because I believed that this subject needed to be debated and I wanted to present a biblical creationist non-geocentric point of view, which still permits our planet Earth to be in a special place in the Universe. That does not mean that it is stationary and that it is in the unique centre of the cosmos. See The Cosmological Principle and geocentrism for my opinion on geocentrism. At the time I agreed to be interviewed, I did know that the producers were geocentrists but they assured me they would present a balanced debate, where all sides were aired. Actually, I wanted to help because, maybe naïvely, I believed it could get a good strike against the cosmological principle dominating paradigm.

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Cosmology History Physics

Big Bang Fudge Factors

Hubble-universe
Alleged history of the Universe (from wikipedia)

The big bang model, used to describe the observations made in the universe, according to its advocates, now precisely has determined the history of the Universe. See left graphic. Yet to do so it is filled with unproveable fudge factors. That may sound like an exaggerated claim but it seems to be the state of cosmology today. (This article was edited and updated from my article ‘Cosmology is not even astrophysics,’ originally published 3 December 2008, creation.com.)

This situation has come about because of the unverifiable starting assumptions are inherently wrong! Some brave physicists have had the temerity to challenge the ruling paradigm—the standard big bang ΛCDM inflation cosmology.1 One of those is Prof. Richard Lieu, astrophysicist, of the Department of Physics, University of Alabama, who wrote:2

‘Cosmology is not even astrophysics: all the principal assumptions in this field are unverified (or unverifiable) in the laboratory … .’ [emphasis added]

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