What Are the Theories Behind the Origins of Our Universe?

[zynko]

They say it would take 10 trillion trillion degrees and probably tons of pressure. Maybe more then the center of a red giant. Maybe more then a neutron star. Well if this is the way our universe began, were did the temperature and pressure come from.
I am reading different stuff on how the big bang or the beginning of the universe was and i can't piece it together...one reading says that all the dimensions where interconnected and one big universe tell it broke into two pieces..a 4 dimensional universe and a 6 dimensional universe, and that the 6 dimensional universe shrunk done to the Planck length (Hyperspace by Michio Kaku).
Another reading says that it had somthing to do with gravitation and vacuums and everything being compressed to the size at whitch a proton look gigantic (The History of Everything by Bill Bryson).

And the top paragraph was a thought of mine...Can someone help me piece this together? Is it all connected or different theorys?

 

[thermodynamicaldude]

I think the 10 dimensional universe theory (4 macroscopic dimensions, and 6 microscopic dimensions) has to do with string theory, which has not yet been proven experimentally (Which would be rather difficult).

I suppose the latter explanation is how general relativity would explain it. I think both theories would work in combination together, its just that general relativity and other laws describing macroscopic bodies have been proven experimentally, while the string theory (along with the idea that there are 10 dimensions) has not.

Somebody please correct me if I'm wrong.

 

[R0man]

There are many theories and ideas about the origins of our universe, and it can be overwhelming to try and piece them all together. It's important to remember that these are just theories and our understanding of the universe is constantly evolving as we gather new evidence and information.

The idea of a 4 dimensional and 6 dimensional universe is a concept in string theory, which is one of the many theories attempting to explain the origins of the universe. String theory suggests that there are more dimensions beyond the three we can perceive, and that they were compacted at the beginning of the universe. However, this is just one theory and it is still being explored and debated by scientists.

The concept of gravitation and vacuums compressing everything to the size of a proton is another theory known as the "big bounce" or "cyclic universe" theory. This theory suggests that our universe goes through cycles of expansion and contraction, with each cycle beginning with a "big bang" and ending with a "big crunch." Again, this is just one theory and it is still being studied and debated.

It's important to keep an open mind and continue to explore the different theories and ideas about the origins of our universe. We may never have a definitive answer, but the pursuit of knowledge and understanding is what drives science and discovery.