The MultiVerse Simply Explained - Part 2 of 5 (Or How To Bake Your ...

As mentioned in Part 1, the Multiverse is an hypothesis that there are more universes than the one that we can currently observe with our eyes and our various scientific instruments.

In this post the bubble multiverse hypothesis will be presented.

_{Many 3-D Universes Each Residing In A Larger 4-D Mega Universe

(image credit: PxHere free image website)}

Bubble Universes

We are used to our current three dimensional (3-D) universe. There is an up and down, a left and a right, a backward and a forward. Trying to think of another dimension beyond this into the 4-D is quite literally impossible because we are not evolved to do so. It is not impossible though for physicists and mathematicians to represent four dimensions mathematically and there is a well thought out notation well developed to do just this.

In Part 1 of this series the concept of the Hubble Volume was introduced. Now consider that our current observable universe, or Hubble Volume resides in a larger four dimensional space.

Next it is reasonable to speculate that there could be other three dimensional universes also residing in that larger 4-D space. Each one will be effectively isolated from the other because the signals (light, gravity etc.) generated within each one is trapped within that volume. There is no way of knowing that these other universes exist. At least at our levels of technology.

Also note that this hypothesis is different than the conventional multiverse hypothesis presented in Part 1 because bubble universes are not directly connected (well, at least in 3-D).

We know that our universe is about 13 billion years old and is currently expanding. Other universes could be younger or older than ours. They could also be smaller or larger than ours. The laws of physics or the constants of physics may even be different. If this were true there could be universes without life or even proper stars. They may not even have proper atoms. These bubbles could even expand, stop and contract into a new big bang.

Are these bubbles close or far from each other. Would they be able to influence or even 'touch' one another as they evolved? That is the subject of a later post.

_{More eye candy. A more artistic representation of bubble universes

(image credit: PxHere free image website)}

Finally the Anthropic Principle is a philosophical idea that was developed in response to ideas like the one just mentioned. Maybe this Universe is so-fine tuned for us to exist because if it were not then there would simply be no life to observe it. There would then need to be countless Universes each with different laws or physics and chemistry in order to produce one, ours, that is tuned to produce life.

If that doesn't bake your noodle I don't know what will. Oh yes, my upcoming posts in this series, they will bake your noodle for sure.

The MultiVerse Simply Explained - Part 2 of 5 (Or How To Bake Your Noodle In A Few Easy Steps)

Bubble Universes

Further Reading