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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yes. But what evidence do we have that travel back in time is not infinite?


What are you getting at?
Experiencing time's passage up to and prior to the Big Bang?
Perhaps itself a random explosion following a Big Crunch of another universe? Is there a reason it would have the same physics as this one, being the coalescence of a different Big Bang?


what if it was? How would such a discovery change the established laws of physics?
 
Hmmm. Yes...

Is it impossible that:
The universe is expanding because there is "nothing" outside, like thin oil on top of water, and the void from where it's expanding from have such a vacuum that particles (both positive and negative) pop in and out of existence continuously, when the space consisting of intermittent particles is stretched the particles become permanent in random bursts, further strenghtening the process.

How's that for a "free thinker" Galu? :D
I dare you to prove that this is more unlikely than the Big Bang :D
 
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Once upon a time, there was nothing, a nothing full of intermittent virtual particles popping in and out of existence continuously. Like noise on a pitch black canvas stretching for infinity.
At one point in time, two of these particles bumped into each other and because of this they solidified. This first solidifying of matter caused a reaction on the surrounding "noise", at random, other particles started filling the void, sometimes pushing, other times dragging. This caused an expansion of matter. After intitializing the expansion process and some increase in the existence of solid particles, the expansion triggered a vacuum. This vacuum had an increased rate of "noise" particles in a limited amount of space, further accellerating the increase of matter.

: There was never a "big bang" it is more of a "oil slick ooze" :D
 
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A wild ride into Cosmology and Geometry. Took us a while to wrap our heads round it, IMO. :)

I now want to get a grip on the RATE of Expansion. Back of a beermat stuff at this stage.

This is our nearest neighbour Andromeda if you had a good camera:

827039d1584904798-universe-expanding-moon-andromeda-jpg


Approximately a MegaParsec away. About 3.3 Billion kilometres I think. A Parsec being 3.3 light years. About the distance to our nearest stars.

What Is The Hubble Constant? | Space

Apparently the space between us and approaching Andromeda is expanding at an enormous 70km/s per MegaParsec.

Slightly slower on the distant objects, which are back in time. About 60km/s.

That's a lot. I am hoping to use hitherto neglected Matrix Mechanics to get a grip. But weirdness indeed. 1. The Geometry of Linear Equations - YouTube
 
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TNT

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Joined 2003
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I wasn't totally convinced after all... "As we discussed, you can figure that out by making measurements on the surface of the sphere. You don’t need to say anything about the embedding space surrounding the sphere." Yeees but by just saying - ignore what is outside.... doesn't help me really.. :)

If she had said: Well, if you didn't get this, here is hwo to see it: There is only one entity - universe and it is expanding. Yes - one entity only and nothing more. Accept! But she is talking about two entities and that makes it problematic for me...

So I still don't get/accept it. Actually, I'm confused to the point that I cant sort out if I don't get it or don't accept it ;-D

//
 
Is there conclusive proof space is actually expanding? Or are we just pretty sure? Has it been proven that red shift is due to motion?
In 1920s, cosmologist Edwin Hubble found that the more distant a galaxy, the faster it is moving away from us. This is Hubble’s law. This observational law is the proof that the Universe is expanding.

You are referring to the cosmological redshift which is not due to the relative motion of galaxies. The photons redshift because of the stretching of the local spacetime through which they are traveling.
 
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