The concept of the multiverse refers to the hypothetical existence of multiple universes, each potentially having its own unique physical laws, constants, and properties. However, it is important to note that the multiverse is a speculative idea in physics and currently lacks direct observational evidence.
Given our current scientific understanding, it is not possible to make direct observations or see into other universes within a multiverse, if they indeed exist. The different universes in a multiverse are typically considered to be causally disconnected from each other, meaning they cannot interact or be directly observed from one another.
In cosmology, the observable universe refers to the portion of the universe that we can, in principle, observe given the finite speed of light and the age of the universe. It encompasses all the regions from which light has had enough time to reach us since the Big Bang, which is estimated to be about 13.8 billion years ago.
However, the multiverse, if it exists, could potentially encompass a much larger realm beyond our observable universe. Some theories propose that different universes within a multiverse could have different physical properties, laws of nature, or even dimensions. However, exploring or observing these other universes is highly speculative and remains a topic of active research and theoretical investigation.
It's important to recognize that the concept of the multiverse is still being explored and studied within the realms of theoretical physics and cosmology. At present, our observational capabilities and scientific understanding are limited in terms of directly probing or seeing into other universes that may exist within a multiverse framework.