In the concept of eternal inflation, which is a hypothesis in cosmology, it is suggested that our observable universe is just one of many universes within a larger multiverse. However, it is important to note that the idea of eternal inflation and the multiverse is still speculative and an active area of scientific research.
According to this hypothesis, during the early stages of the universe's expansion after the Big Bang, there could have been a rapid and exponential inflationary period. This inflationary process may continue indefinitely in certain regions, leading to the creation of numerous "bubble" universes within the larger multiverse.
The exact number of universes in eternal inflation is unknown and difficult to determine. The hypothesis suggests that the multiverse could be vast, potentially containing an infinite number of universes or an incredibly large but finite number. However, due to the limitations of our current observational capabilities and the complexity of the multiverse concept, it is challenging to provide a definitive answer regarding the precise number of universes in eternal inflation.
It's worth mentioning that the concept of the multiverse and its different variations, including eternal inflation, are still theoretical and require further observational and experimental evidence to validate or refine our understanding.