After.... Galu is sure inflation happens before BB...
Fo me, BB is the whole "Bom"... ;-)
Then one can pick it apart....
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I believe that should read "cosmic inflation ... before the Big Bang".
At times like this I ask Ethan: https://www.forbes.com/sites/starts...-was-it-like-when-the-universe-was-inflating/
The current hypothesis is that the Big Bang wasn't the beginning of the Universe. Before the inflation period that is generally referred to as the Big Bang, there was another shorter but much more violent period of exponential expansion during which the size of the Universe increased many, many times over. This initial period of inflation has been dubbed cosmic inflation and it may be considered to represent the beginning of the Universe, not the Big Bang.
During cosmic inflation, the energy that is intrinsic in cold, empty space itself was transformed into the hot dense soup of matter, antimatter and radiation that set up the conditions for the Big Bang. The transition from a cold, empty spacetime into the beginning of a hot Big Bang is known as cosmic reheating.
Apparently, only the final 10^-32 seconds (or so) of cosmic inflation have left observable signatures on our Universe - don't ask me what they are!
Of course, all of this is hypothetical - no one knows, or can ever know, what happened before the Big Bang.
Its so fun how the scientists name these events... a "period" is 10-30 seconds 🙂 A "period" is Krita etc ;-D
If we can figure out the end of the universe, and if universe is repetitive - we could find out what happens "before" (a new version).
If it ends in infinite nothing, but we still think that BB happened, we are most probably out of luck finding out what was before the single one start / BB.
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If we can figure out the end of the universe, and if universe is repetitive - we could find out what happens "before" (a new version).
If it ends in infinite nothing, but we still think that BB happened, we are most probably out of luck finding out what was before the single one start / BB.
//
I once read about what went on in that time period. Seemed to be rather a lot. Sky & Telescope article over 2 issues, those are monthly. They were not one liners, pages.
Ethan says the idea that space, time, and all the matter and energy within began from a singular point is wrong, and that scientists have known this for more than 40 years!
https://www.forbes.com/sites/startswithabang/2017/09/21/the-big-bang-wasnt-the-beginning-after-all/
He says, "The hot Big Bang definitely happened, but doesn't extend to go all the way back to an arbitrarily hot and dense state. Instead, the very early Universe underwent a period of time where all of the energy that would go into the matter and radiation present today was instead bound up in the fabric of space itself. That period, known as cosmic inflation, came to an end and gave rise to the hot Big Bang, but never created an arbitrarily hot, dense state, nor did it create a singularity."
Next question, what happened prior to cosmic inflation?
https://www.forbes.com/sites/startswithabang/2017/09/21/the-big-bang-wasnt-the-beginning-after-all/
He says, "The hot Big Bang definitely happened, but doesn't extend to go all the way back to an arbitrarily hot and dense state. Instead, the very early Universe underwent a period of time where all of the energy that would go into the matter and radiation present today was instead bound up in the fabric of space itself. That period, known as cosmic inflation, came to an end and gave rise to the hot Big Bang, but never created an arbitrarily hot, dense state, nor did it create a singularity."
Next question, what happened prior to cosmic inflation?
It's anyone's guess. And since we do not have the mathematical or observational tools to delve past that point, it becomes pure conjecture and nothing more, no matter who is delving into it.
My understanding is the universe was in an unknown state, then cosmic inflation took place at around 10-^32 seconds when it expanded 10^78 times after which the BB took place. At 10^-12 after cosmic inflation initiated, the Higgs bosun formed and then we had gravity. After 1 Second, the BB is well under way and the universe has started in 13.8 Billion year journey.
Have I got this wrong (its Xmas - you can be brutal 😀 )
I haven't checked your figures as laptop is having a break.
However I'm sure you're not barking up the wrong Christmas tree!
However I'm sure you're not barking up the wrong Christmas tree!
Very nice article here on the large voids in the cosmos
https://www.scientificamerican.com/article/how-analyzing-cosmic-nothing-might-explain-everything/
https://www.scientificamerican.com/article/how-analyzing-cosmic-nothing-might-explain-everything/
Thanks, those links will help fill a large void in my life! 🤓
I've rediscovered my favourite site detailing the timeline of events following the Big Bang:
https://www.physicsoftheuniverse.com/topics_bigbang_timeline.html
The information contained within the actual site looks to be pretty comprehensive, but we may still be able to pick holes in it!
For example, the point at which cosmic inflation is said to take place!
I've rediscovered my favourite site detailing the timeline of events following the Big Bang:
https://www.physicsoftheuniverse.com/topics_bigbang_timeline.html
The information contained within the actual site looks to be pretty comprehensive, but we may still be able to pick holes in it!
For example, the point at which cosmic inflation is said to take place!
Then where are all these smarty pants, unqualified and self-appointed physicists suddenly emerging from?
Where have you been hiding?
Our emergence is not sudden - we've been talking drivel for years now! 😉
The Boötes Void or the Great Nothing is so big and so empty that if the Milky Way had been in its centre, we wouldn't have known there were other galaxies in the Universe! 😎
More on voids here: https://asd.gsfc.nasa.gov/blueshift/index.php/2013/07/30/jasons-blog-next-stop-voids/
Attachments
VERY INTERESTING MATHEMATICS
I want someone (or more) to watch the following YouTube video (starting about 5 min. in)
to decipher for me the exact number/fraction of the dip being explained , where fall becomes rise.
If the exact number is found >
I TRUELY BELIEVE THIS NUMBER IS AS IMPORTANT AS Pi
I want someone (or more) to watch the following YouTube video (starting about 5 min. in)
to decipher for me the exact number/fraction of the dip being explained , where fall becomes rise.
If the exact number is found >
I TRUELY BELIEVE THIS NUMBER IS AS IMPORTANT AS Pi
I've seen variations of these types of images, I'm curious to know why the Universe is depicted in such a way.
Is it -
a) A scientific representation of the physical Universe for the purpose of discussing scientific concepts.
or
b) The actual physical Universe.
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If it's irrational which I suspect it will be no one will be able to calculate an exact value.
Rusty neurons. A simple difference table may give an indication. Subtract each one and then subtract each difference repeatedly. Say the table was a power law. The differences will eventually be constant. That I suspect means the numbers must be reals. 😉 Too long ago to fully remember.
Rusty neurons. A simple difference table may give an indication. Subtract each one and then subtract each difference repeatedly. Say the table was a power law. The differences will eventually be constant. That I suspect means the numbers must be reals. 😉 Too long ago to fully remember.
It seems it could be a model of the actual universe as it represents what we see when we use our telescopes. As if we where peeking down into that bowl from the top. At least down to say a couple of 0,1M years as then the glow is to intense to peek through... And it seems it doesn't matter where we aim - it looks about the samein any direction. The two pictures are the same...
The current state is of course only the upper rim - the rest has already happened.
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The current state is of course only the upper rim - the rest has already happened.
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