# Mysteries of Parallel Universe

**- brought to you by The Spacestellar**

**" Have you ever heard about the Parallel Universe..?? "**

**" Is it possible to have someone as same as you exist somewhere..?? "**

**" Is it possible for us to travel there..?? "**

Science fiction has always been more exciting to discover than facts. One such concept which can be considered as both fact as well as fiction, is what we call 'Parallel Universe'. Whenever we come across the word parallel universe, we try to picturise something like this in our minds.

Parallel Universe means that a universe that exists besides our own one, where all the choices you made in your life in the current universe play out in an alternate reality. It is a part of 'Multiverse Theory' in astronomy.

The story has begun 13.7 billion years ago when all the atoms were concentrated into a singularity which got exploded into a 3-dimensional space and kept expanding continuously due to inflation. But the question is, whether is it the only one universe which is into the existence. There are many theories that suggest the existence of multiple universes. Heisenberg's uncertainty principle states that, " It's impossible to simultaneously calculate position and momentum of an electron " which also says that, " At a given time an electron can exist in multiple positions ". This principle led to the foundation of the Parallel Universe theory or so what " The Multiverse Theory ".

But the big question is, if there is a parallel universe, then why can't we detect it..??

With the current technology, it is not possible for us to find traces for the existence of a parallel universe. But with so much innovation and advancing science we are very sure to detect one in the coming days.

The Large Hedron collider which has been set up in Geneva, Switzerland is very active in detecting new particles and the scientists are working very hard to dectect any traces of parallel universe

Currently we have at least five theories which suggests the existance of parallel universe.

Let us go by the most famous one :

**1. Infinite Universes :**

Scientists are not pretty sure what's the actual shape of space-time. Most likely, it's flat (as opposed to spherical or even donut-shape) and stretches out infinitely. But if space-time continuous forever, then it must start repeating at some point, because there are a finite number of ways particles can be arranged in space and time.

So if you look far enough, you would encounter another version of you — in fact, infinite versions of you. Some of these twins will be doing exactly what you're doing right now, while others will have worn a different T-Shirt this morning, and still others will have made vastly different career and life choices.

Because the observable universe extends only as far as light has had a chance to get in the 13.7 billion years since the Big Bang (that would be 13.7 billion light-years), the space-time beyond that distance can be considered to be its own separate universe. In this way, a multitude of universes exists next to each other in a giant patchwork quilt of universes.

**2. Bubble Universes :**

In addition to the multiple universes created by infinitely extending space-time, other universes could arise from a theory called "eternal inflation." Inflation is the notion that the universe expanded rapidly after the Big Bang, in effect inflating like a balloon. Eternal inflation, first proposed by Tufts University cosmologist Alexander Vilenkin, suggests that some pockets of space stop inflating, while other regions continue to inflate, thus giving rise to many isolated "bubble universes."

Thus, our own universe, where inflation has ended, allowing stars and galaxies to form, is but a small bubble in a vast sea of space, some of which is still inflating, that contains many other bubbles like ours. And in some of these bubble universes, the laws of physics and fundamental constants might be different than in ours, making some universes strange places indeed.

**3. Parallel Universes :**

Another idea that arises from string theory is the notion of "braneworlds" — parallel universes that hover just out of reach of our own, proposed by Princeton University's Paul Steinhardt and Neil Turok of the Perimeter Institute for Theoretical Physics in Ontario, Canada. The idea comes from the possibility of many more dimensions to our world than the three of space and one of time that we know. In addition to our own three-dimensional "brane" of space, other three-dimensional branes may float in a higher-dimensional space.

Columbia University physicist Brian Greene describes the idea as the notion that "our universe is one of potentially numerous 'slabs' floating in a higher-dimensional space, much like a slice of bread within a grander cosmic loaf," in his book "The Hidden Reality"

A further wrinkle on this theory suggests these brane universes aren't always parallel and out of reach. Sometimes, they might slam into each other, causing repeated Big Bangs that reset the universes over and over again.

**4. Daughter Universes :**

According to the theory of Quantum mechanics, which deals over the tiny world of subatomic particles, suggests another way multiple universes might arise. Quantum mechanics describes the world in terms of probabilities, rather than definite outcomes. And the mathematics of this theory suggest that all possible outcomes of a situation do occur — in their own separate universes. For example, if you reach a crossroads where you can go right or left, the present universe gives rise to two daughter universes : one in which you go right, and one in which you go left. Similarly, you could have a scenario in which you might give birth to a boy child in one and a girl child in the other parallel universes.

"And in each universe, there's a copy of you witnessing one or the other outcome, thinking — incorrectly — that your reality is the only reality,"

**5. Mathematical Universes :**

Scientists have always debated whether mathematics is simply a useful tool for describing the universe, or whether math itself is the fundamental reality of universe, and our observations of the universe are just imperfect perceptions of its true mathematical nature. If the latter is the case, then perhaps the particular mathematical structure that makes up our universe isn't the only option, and in fact all possible mathematical structures exist as their own separate universes.

"I really believe that there