Surprise: the Big Bang isn’t the beginning of the universe anymore

Arlo · 10-15-21, 01:39 PM

We used to think the Big Bang meant the universe began from a singularity. Nearly 100 years later, we're not so sure.

Where did all this come from? In every direction we care to observe, we find stars, galaxies, clouds of gas and dust, tenuous plasmas, and radiation spanning the gamut of wavelengths: from radio to infrared to visible light to gamma rays. No matter where or how we look at the universe, it’s full of matter and energy absolutely everywhere and at all times. And yet, it’s only natural to assume that it all came from somewhere. If you want to know the answer to the biggest question of all — the question of our cosmic origins — you have to pose the question to the universe itself, and listen to what it tells you.

Today, the universe as we see it is expanding, rarifying (getting less dense), and cooling. Although it’s tempting to simply extrapolate forward in time, when things will be even larger, less dense, and cooler, the laws of physics allow us to extrapolate backward just as easily. Long ago, the universe was smaller, denser, and hotter. How far back can we take this extrapolation? Mathematically, it’s tempting to go as far as possible: all the way back to infinitesimal sizes and infinite densities and temperatures, or what we know as a singularity. This idea, of a singular beginning to space, time, and the universe, was long known as the Big Bang.

But physically, when we looked closely enough, we found that the universe told a different story. Here’s how we know the Big Bang isn’t the beginning of the universe anymore.

https://bigthink.com/starts-with-a-b...AZ0Gj7liAW5Qug

Skybird · 10-15-21, 01:45 PM

https://www.amazon.co.uk/Universe-No...srpt=ABIS_BOOK

mapuc · 10-15-21, 01:51 PM

I think our galaxy The Milky Way started with this Big Bang 16 to 17 billion years ago.
When it comes to the rest of the univers(es)it has always been there. No beginning and no end.

Galaxy dies and galaxy are born like our Milky Way.
Univers(es) expanding continues for ever

The perpetrator behind this is Dark matter

Markus

Skybird · 10-15-21, 02:37 PM

Think twice, Markus - under guidance by the linked book.

Things might not be what they look like. In the end, Big Bang is just a theory, made - like every theory - by best possible use of known facts at a given time. Possible that one day we put Big Bang into relation to a bigger context, as comologists today already do, or replace it completely with a then better fitting theory.

Scientific theories are never-ending construction sites. That is no criticism, nor pessimism - but the essence of the scientific process. No absolutes, no penultimate truths.

mapuc · 10-15-21, 03:11 PM

Quote:

Originally Posted by Skybird

Think twice, Markus - under guidance by the linked book.

Things might not be what they look like. In the end, Big Bang is just a theory, made - like every theory - by best possible use of known facts at a given time. Possible that one day we put Big Bang into relation to a bigger context, as comologists today already do, or replace it completely with a then better fitting theory.

Scientific theories are never-ending construction sites. That is no criticism, nor pessimism - but the essence of the scientific process. No absolutes, no penultimate truths.

The Theory behind Big Bang is that the entire universe started from a little atom and throughout billions of years it expand to what it is today.

I say the theory could very well fit our own galaxy the Milky Way, but not the entire universe.

I have, based on all the documentary I've seen, heard and read, created my own theory.

Secondly
Nothingness can't exist. Universal law forbid this.

There are more universes than ours.

Markus

Arlo · 10-15-21, 03:28 PM

Quote:

Originally Posted by mapuc

I have, based on all the documentary I've seen, heard and read, created my own theory.

I didn't know you were an astrophysicist.

mapuc · 10-15-21, 03:33 PM

Quote:

Originally Posted by Arlo

I didn't know you were an astrophysicist.

I'm not an astrophysicist far from it.

I just like to create own theory about what's going on in our universe.

Markus

Sean C · 10-15-21, 03:48 PM

Meh. The article linked in the OP begins by stating the big bang isn't the beginning, and concludes by saying that:

Quote:

Inflation could have gone on for an eternity, it could have been preceded by some other nonsingular phase, or it could have been preceded by a phase that did emerge from a singularity.

IOW, the big bang theory is no less plausible than before. More precisely: we're now even less sure whether or not it is the right theory - and we may never know.

Don't get me wrong, it's still fascinating. Just a bit of click-bait at the beginning ... as usual.

What really interests me is the idea of "time" itself in [or "before"] these extremely early states.

Jeff-Groves · 10-15-21, 03:35 PM

Quote:

Originally Posted by mapuc

Nothingness can't exist. Universal law forbid this.

And how exactly do you know what Universal Law is?

mapuc · 10-15-21, 03:42 PM

Universal law is many things.

I made a search for nothingness cannot exist and found this

Quote:

Nothingness doesn't be, that's the definition of nothingness (at least in this question) that what is not, does not exist. If there was no Universe, if there was nothing, nothingness would be, that is the only thing that there would be. Therefore, for nothingness not to be, something must be.

Markus

10-15-21, 01:39 PM	#1
Arlo The Old Man Join Date: Nov 2003 Posts: 1,304 Downloads: 214 Uploads: 0	Surprise: the Big Bang isn’t the beginning of the universe anymore We used to think the Big Bang meant the universe began from a singularity. Nearly 100 years later, we're not so sure. Where did all this come from? In every direction we care to observe, we find stars, galaxies, clouds of gas and dust, tenuous plasmas, and radiation spanning the gamut of wavelengths: from radio to infrared to visible light to gamma rays. No matter where or how we look at the universe, it’s full of matter and energy absolutely everywhere and at all times. And yet, it’s only natural to assume that it all came from somewhere. If you want to know the answer to the biggest question of all — the question of our cosmic origins — you have to pose the question to the universe itself, and listen to what it tells you. Today, the universe as we see it is expanding, rarifying (getting less dense), and cooling. Although it’s tempting to simply extrapolate forward in time, when things will be even larger, less dense, and cooler, the laws of physics allow us to extrapolate backward just as easily. Long ago, the universe was smaller, denser, and hotter. How far back can we take this extrapolation? Mathematically, it’s tempting to go as far as possible: all the way back to infinitesimal sizes and infinite densities and temperatures, or what we know as a singularity. This idea, of a singular beginning to space, time, and the universe, was long known as the Big Bang. But physically, when we looked closely enough, we found that the universe told a different story. Here’s how we know the Big Bang isn’t the beginning of the universe anymore. https://bigthink.com/starts-with-a-b...AZ0Gj7liAW5Qug __________________ -Arlo

10-15-21, 01:45 PM	#2
Skybird Soaring Join Date: Sep 2001 Location: the mental asylum named Germany Posts: 42,604 Downloads: 10 Uploads: 0	https://www.amazon.co.uk/Universe-No...srpt=ABIS_BOOK __________________ If you feel nuts, consult an expert.

10-15-21, 01:51 PM	#3
mapuc CINC Pacific Fleet Join Date: Sep 2003 Location: Denmark Posts: 20,535 Downloads: 37 Uploads: 0	I think our galaxy The Milky Way started with this Big Bang 16 to 17 billion years ago. When it comes to the rest of the univers(es)it has always been there. No beginning and no end. Galaxy dies and galaxy are born like our Milky Way. Univers(es) expanding continues for ever The perpetrator behind this is Dark matter Markus __________________ My little lovely female cat

10-15-21, 02:37 PM	#4
Skybird Soaring Join Date: Sep 2001 Location: the mental asylum named Germany Posts: 42,604 Downloads: 10 Uploads: 0	Think twice, Markus - under guidance by the linked book. Things might not be what they look like. In the end, Big Bang is just a theory, made - like every theory - by best possible use of known facts at a given time. Possible that one day we put Big Bang into relation to a bigger context, as comologists today already do, or replace it completely with a then better fitting theory. Scientific theories are never-ending construction sites. That is no criticism, nor pessimism - but the essence of the scientific process. No absolutes, no penultimate truths. __________________ If you feel nuts, consult an expert.