What is the Universe expanding into..

Do you think there was anything before the big bang?

  • I don't think there was anything before the Big Bang

    Votes: 56 12.5%
  • I think something existed before the Big Bang

    Votes: 200 44.7%
  • I don't think the big bang happened

    Votes: 54 12.1%
  • I think the universe is part of a mutiverse

    Votes: 201 45.0%

  • Total voters
    447
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ok, some 'licsense' on my part. But, at the moment of the B/B, the theory says the whole of what is now the current universe was contained in an incredibly small space. CBR, inflationary universe, and intergalactic 'clumpiness all point to a begining state that was very small.
Yes, I know what the BB theory states.. I only do not agree. Even the heaviest Black Holes do not come close to the indefinite density the BB theory assumes. Even adding multiples of the mass of those Black Holes can't establish such a density. Besides there are indications that Black Holes do not have a globe shape ... So a singularity would be impossible.
 
If the speed of light varies, it has some pretty profound implications for relativity. We would have to fundamentally rethink our notions of how the universe works.

Lots of Einstein naysayers over the decades, but it's stood the test of time thus far . . . But, who knows.
I guess that might depend on the conditions of that variance in C... If eg. C slows down under influence of heavy gravity (denser time-space), the same rules still apply. I do not know if C varies under other conditions... input please?
 
If the speed of light varies, it has some pretty profound implications for relativity. We would have to fundamentally rethink our notions of how the universe works.

Lots of Einstein naysayers over the decades, but it's stood the test of time thus far . . . But, who knows.

You misunderstand me if you thought I was implying Einstein is wrong, quite the opposite.
 
Also, there are good reasons for believing that no amount of evidence will ever verify a theory in any absolute sense, for theories always (and seemingly inevitably) appear to be underdetermined by the available evidence, no matter how extensive that evidence might be (which is why many people side with Popper over Ayer and many other logical positivists in distinguishing science by its falsifiability rather than its verifiability). Evidence can support a theory, of course, but it can never verify one in any absolute sense (which is why scientific claims have to be taken as inherently provisional, a feature that many people, including scientists, sometimes forget).

This is absolutely correct, and in my experience, scientists (and I mean *real* scientists, not "political scientists" or "social scientists" or the like) are extremely aware of it.

In the case of constancy of c, it's not just direct measurements (which we do to insanely good precision and accuracy, and I mean to trillionths), it's all of the measurements of other phenomena which depend on the constancy of c which give us certainty about this as an established fact. Any hypothesis about changes in c have to also explain the massive amount of experimental support from both direct measurements and measurements of other phenomena which depend on that constancy. As you might expect, just as with the Three Laws of Thermodynamics, this is a high barrier to overcome, which is why those hypotheses are generally considered (at best) to be on the fringes.
 
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Yes, I know what the BB theory states.. I only do not agree. Even the heaviest Black Holes do not come close to the indefinite density the BB theory assumes. Even adding multiples of the mass of those Black Holes can't establish such a density. Besides there are indications that Black Holes do not have a globe shape ... So a singularity would be impossible.


I don't think you can take a single black hole as observed in the current universe and equate it to the mass of 30 x 10^22 stars.

Clearly, they do vary in size, and if our universe emerged from 'the other side' of a black hole, as some have postulated, it must have been quite immense.

However, the latest are that our universe will not collapse in on itself, but go on expanding in perpetuity.
 
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As you might expect, just as with the Three Laws of Thermodynamics, this is a high barrier to overcome, which is why those hypotheses are generally considered (at best) to be on the fringes.


See I thought there were 4 Laws of thermodynamics.

I myself would prefer that there were not so many divisions within science, some concepts of the zeroth law of thermodynamics support infinity, perhaps that it is why it is ignored in 2014 by some?

Where does Darwinism begin?, which leads to the definition of life, life is everywhere if you broaden your definition of what life is.

Life did not start after the Late Heavy Bombardment 4.1 billion years ago, merely the life we recognize today was influence by elements that mixed with existing elements at a opportunistic time and place.

What makes the hydrogen within us more "alive" then the hydrogen in the sun?

At what point does one group of elements get alienated from others becoming an "individual"?

Looser definitions would classify the sun as an animal, and what a beast it is.

Too bad Darwin and Einstein did not have the opportunity to cross paths.
Darwin could explain the existence of Einstein, I wonder if Einstein could explain the origin of Darwin....to be a fly on that wall.
 
That is just playing with words.

The constancy of the speed of light in an inertial frame in a vacuum is now assumed, so that it is now defined to be constant. I'm not convinced that is a wise move. The result is that if in fact c is changing then one day we will notice it as a change in the length of the metre!

All the results of relativity flow from the postulate of the constancy of the speed of light, have been well proven, and are used in GPS, for example.

The length of a meter is now defined as the distance light travels in a vacuum in
1/(299 792 458) second.
 
Can the speed of light accelerate and decelerate in different spatial environments of various physical (matter, substance) compositions?

How come sound is absent in space?

And why living near the ocean water surface is a different sound (music) experience than living near the top of Mount Everest?
...Or two twenty thousand feet below sea level.

Does sound change in the horizontal plane when in constant (same) position towards its source of origin?

I think so... is this not how a prism splits the colours ?

Is it absent ? all depends on the density of the medium that will propagate the sound ?

See above ... density of the sound propagating medium ( helium balloon lol)

No. The sound emitted will change with different source alignements... but once out there ? no.

soz to have woken u from ur slumber... ;-)

all the posts are relevant to the original question ? YES !

Please enlighten me to the real truth if u wud be so kind... the only entity in the universe that knows the answer is now going to impart the truth on us all.. go ahead ;-) KEEP ON READING EVERYONE'S POSTS :)

If I could add my own speculative two cents, it seems highly unlikely that the speed of light would be an absolutely fixed constant. Isn't it more plausible that the speed of light is not absolute, but that its rate of change relative to us would be so slow as to appear constant?

Me too I immensely enjoy the discussion; this is truly a most fascinating subject.

<<>> Albert Einstein Wrong: Speed of Light Calculation May Be Incorrect

Of course it is; it was wrong right from the get-go!
 
I was actually enjoying the recent discussion.

We all do.

If I could add my own speculative two cents, it seems highly unlikely that the speed of light would be an absolutely fixed constant.


Above post.

Einstein's theory rests upon the postulate of the constant speed of light.
All the tests that have ever been done have confirmed the theory. Therefore, this postulate is quite well founded.

...
 
If the speed of light varies, it has some pretty profound implications for relativity. We would have to fundamentally rethink our notions of how the universe works.

Big time!

Lots of Einstein naysayers over the decades, but it's stood the test of time thus far . . . But, who knows.

It's coming to an end...

You misunderstand me if you thought I was implying Einstein is wrong, quite the opposite.

...


From that link keep reading, the comments. ...For a wider, 'expanding universe' perspective.
 
All the results of relativity flow from the postulate of the constancy of the speed of light, have been well proven, and are used in GPS, for example.

The length of a meter is now defined as the distance light travels in a vacuum in
1/(299 792 458) second.

What is the law of relativity?
...A man-made (physicist) theory based on his extremely limited knowledge on all things expanded universe?
 
I don't think you can take a single black hole as observed in the current universe and equate it to the mass of 30 x 10^22 stars.

Clearly, they do vary in size, and if our universe emerged from 'the other side' of a black hole, as some have postulated, it must have been quite immense.

However, the latest are that our universe will not collapse in on itself, but go on expanding in perpetuity.
Even that mass doesn't come close to the requirements for a singularity.... it is not going to happen. ;)
 
I'm trying to find anything in that article which is correct. So far, I have failed.

That's the point; it is in suspension right now at this time, till someone real smart can confirm or decipher or dislocate.

But me I believe that the speed of light is inconsistent (variable) in different pressure zones of space. ...Ticker particles of matter can slow down its speed.
Of course I've never been there, only experienced it in some of my dreams.
 
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