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There are a couple of different ways to consider the universe.One definition would be that the Universe comprises of all that exists.
A subset of the Universe would be the "Observable Universe" which consists of a sphere with a radius of approximately 13.2 billion lightyears, with the Earth at the center. Of course, the most distant objects. would have changed significantly since the light was emitted shortly after the Big Bang.
Unfortunately many of our observations about the universe are confounded by the time it takes light to get here.
If the Cosmic Microwave Background Radiation frame is the true rest frame, and the Milky Way is moving at approximately 552 km/s with respect to the CMBR, then we may in fact be some distance form the center of the total Universe.
Anyway, so, we are in the middle of the Observable Universe, but may not be able to determine where we are at with respect to the universe as a whole.
A common analogy for the expansion of the universe is to draw dots on the surface of a balloon, representing galaxies. As you blow up the balloon, all of the dots move away from each other. There is no unique "center" of the expansion in this two-dimensional surface.
If we go to smaller and smaller times since the Big Bang, the green circle shrinks to a point, but the 78 billion light year box is always full, and it is always an infinitesimal fraction of the infinite Universe.
Old guy. You seem reasonable please explain one dimension as a line. Draw a line. It has both width and length no matter how thin the pencil. The first dimenson musy be time as is truley one dimension. Check carl sagans representaion of flat land. Not arguing but semantics over the order of dimensions
Now we are getting somewhere roger that. agree what about parralell univesre theory. Be really cool to jump betweensorry for being unimaginitive and confined to popular teachings. Btw not so young myself. Noy usual uni drone
Exactly my point. How is the matter being recycled afte expansionuni directional. Or bidirectional. Using gravitational compresion explain how it goes from big bang to another if the matter is dissapated over time
2 novas explode next to each other matter goes towards the other.Were expanding moving away your talking micro im thinking macro
btw, Emc2, my definition of "universe" is the observable one that contains all the physics we have to deal with. I agree with the principle of an ultimate infinity but it's pointless to apply that definition when we have no access to anything outside what we can see. (-ish. You get my point. Right?)