The Inflation Theory proposes a period of extremely rapid (exponential) expansion of the universe during its first few moments. It was developed around 1980 to explain several puzzles with the standard Big Bang theory, in which the universe expands relatively gradually throughout its history.
Keeping this in consideration, what is the meaning of inflation theory?
In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe. The inflationary epoch lasted from 10−36 seconds after the conjectured Big Bang singularity to sometime between 10−33 and 10−32 seconds after the singularity.
What is the definition of the inflation theory?
A theory according to which the universe underwent extremely rapid expansion after an original event called the big bang, and has been expanding ever since. The basic homogeneity in the distribution of matter in the universe was established as a consequence of the first phase of inflation. Compare steady state theory.
What is a bubble universe?
In this picture, our universe is one bubble in a frothy sea of bubble universes. That's the multiverse hypothesis in a bubbly nutshell. It's not a bad story. It is, as scientists say, physically motivated – not just made up, but rather arising from what we think we know about cosmic inflation.