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Ursprungligen postat av
Fri
Jaha, är han det.
Jag känner för att köpa lite röka till helgen, är Uffe på gatan den man ska fråga?
Du pratar som om han hittat på det här alldeles själv under nån slags tripp. Jag tar det som att du inte har en aning om vem han är för Danielsson är själva definitionen av en nykter och vettig människa. Kolla upp honom. Tror inte du blir besviken. Och även i det här fallet ser det ut som att han kan ha rätt.
Danielsson i Filosofiska rummet, P1:
https://ulfdanielsson.com/radioprogram/filosofiska-rummet/
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https://www.forbes.com/sites/startswithabang/2018/07/27/there-was-no-big-bang-singularity/#ae5a24c7d815
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Every time you see a diagram, an article, or a story talking about the "big bang singularity" or any sort of big bang/singularity existing before inflation, know that you're dealing with an outdated method of thinking. The idea of a Big Bang singularity went out the window as soon as we realized we had a different state — that of cosmic inflation — preceding and setting up the early, hot-and-dense state of the Big Bang. There may have been a singularity at the very beginning of space and time, with inflation arising after that, but there's no guarantee. In science, there are the things we can test, measure, predict, and confirm or refute, like an inflationary state giving rise to a hot Big Bang. Everything else? It's nothing more than speculation."
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https://blogs.scientificamerican.com/critical-opalescence/gravitational-waves-reveal-the-universe-before-the-big-bang-an-interview-with-physicist-gabriele-ven eziano/
"The term “big bang” really refers to the beginning of the universe as we know it–that is, an expanding universe filled with matter that has cooled and coagulated into galaxies.
Cosmic inflation, the process the BICEP2 results appear to have vindicated, occurred before the big bang by this definition."
GM: What’s the problem with common usage of the term “big bang”?
GV: People are confusing two things in my opinion. There is something which we may call an effective big bang. We have known for quite a while that the universe had to be hot at some time, because without that hot moment, we would not have been able to have big-bang nucleosynthesis and all sorts of processes that needed this high temperature.
That hot moment, according to the modern view, is what must have happened after inflation. So, clearly the effective big bang was not the beginning of time. There was something before that. The “bang” in people’s mind is the idea that there had to be a beginning. But we don’t know, really, what preceded inflation.
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https://medium.com/starts-with-a-bang/what-was-it-like-when-the-universe-was-inflating-f9346f3527d4
Cosmic inflation is what happened before, and set up, the Big Bang.
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https://wmap.gsfc.nasa.gov/universe/bb_cosmo_infl.html
The Inflation Theory, developed by Alan Guth, Andrei Linde, Paul Steinhardt, and Andy Albrecht, offers solutions to these problems and several other open questions in cosmology.
It proposes a period of extremely rapid (exponential) expansion of the universe prior to the more gradual Big Bang expansion, during which time the energy density of the universe was dominated by a cosmological constant-type of vacuum energy that later decayed to produce the matter and radiation that fill the universe today.
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https://medium.com/starts-with-a-bang/there-was-no-big-bang-singularity-ae438985fcca
Almost everyone has heard the story of the Big Bang. But if you ask anyone, from a layperson to a cosmologist, to finish the following sentence, "In the beginning, there was..." you'll get a slew of different answers. One of the most common ones is "a singularity," which refers to an instant where all the matter and energy in the Universe was concentrated into a single point. The temperatures, densities, and energies of the Universe would be arbitrarily, infinitely large, and could even coincide with the birth of time and space itself.
But this picture isn't just wrong, it's nearly 40 years out of date! We are absolutely certain there was no singularity associated with the hot Big Bang, and there may not have even been a birth to space and time at all.
Om jag får vara lite spydig tillbaka, Fri.. kan det vara så att du hänger upp din världsbild på lite föråldrad information?