An artist’s depiction of multiverse surrounded by Infinite Vacuum

There Is Infinite Vacuum Outside Our Universe And Here’s Why

The presence of anything be it matter or energy will always be finite and the absence of it will always be infinite while vacuum doesn't depend on something to being present in it but still allows anything in it to be present.

In Science, a vacuum is considered something that is devoid of matter and radiation but has bursts of energy in it that we call quantum fluctuations. The vacuum that is inside our universe we call it space which our universe has occupied during its 13.8 billion years of expansion.

Our universe is filled with large number of moving charged particles creating a magnetic field when an electrical charge is in motion. Our Sun, the earth and even our Milky Way galaxy have their own magnetic fields. Similarly, all large galaxy clusters have magnetic fields around them. So its quite safe to say our universe has a gigantic magnetic field around it.

The relic at the outskirts of the galaxy cluster CIZA J2242+53, named „Sausage“ because of its shape, is located at a distance of about two billion light years from us. The contour lines show the intensity of the radio emission at a wavelength of 3 cm, observed with the 100-m Effelsberg radio telescope. The short dashes indicate the orientation of the magnetic field.

Read more at: https://phys.org/news/2017-03-giant-magnetic-fields-universe.html#jCp

But a question arises about what is outside our universe or the multiverse for that matter. What if we reach the edge of the universe and move past the very last galaxy, what are we going to observe beyond that point? To take it a step further, what if we reach the edge of the multiverse and move past the very last universe, what's beyond that point?

What is the limit to the existence of anything be it vacuum or simply the absence of anything?

Absence of Anything Can Be Infinite :

Let us take a look at it from the way we look at the presence or absence of anything. We know that the absence of photons of light in any region of space is darkness which can be infinite depending on the limit of the presence of light. The absence of matter means there is no gravity. Moreover, as a result of no permanent moving charges, there are no magnetic fields. All this indicates that the presence of radiation, particles, gravity and electromagnetic fields have to be limited in this grand scheme of design and thus cannot be infinite. As our universe or a giant multiverse had a start so this proposition is further reinforced.

But what about vacuum itself? Can vacuum be infinite?

Take the example of a balloon. When a balloon expands upon inflation, it occupies the space outside of the balloon which allows inflation to happen inside of it. Without it, this inflation cannot happen. Same is the case with our universe. A universe can only expand when it occupies the vacuum outside of the universe into itself thus increasing the total vacuum of space inside it. Though we normally call it space creation but in reality, its just the vacuum which wasn't the part of a universe has now been occupied by the universe upon its creation and expansion.

Infinite Vacuum Scenario :

All of this indicates that vacuum should be infinite irrespective of whether it holds energy or not. Whether the energy contained in the vacuum is infinite is something we can not be fully certain of as energy cant be created nor destroyed and the extent of the presence of energy that causes vacuum fluctuations cant be fully asserted due to our limits of observation in this universe.

Vacuum fluctuations erupting randomly in an empty vacuum.

So if we ever leave the edge of our universe or a multiverse and start traveling in the nothingness of vacuum in an infinite timeline, the farther we would go the more vacuum we would find with no endpoint.