At least 13.8 Billion years ago, our Universe was formed, and it so happened through an event known as the Big Bang, and today we are stuck just in the middle of this Universe.
So, is there an edge to this Universe? Or is it just like the Horizon seen in the Ocean? Let’s find out in this blog.
There is a saying that everything in the Universe has a limit, but technically this saying might not go well with the Universe itself. Because if we define Universe as everything that exists, then there can be nothing existing outside of that existence. Whatever exists is inside this existence, and there is no edge, no end to it.
Think for a second, how did we assume there has to be an edge of the Universe? By this common sense, if our Universe was formed out of a Big Bang some 13.8 billion years ago, it must have expanded to a finite distance in all these billion years. How far can this expansion go? It has to have an end! Right?
But, you know what? This assumption might be wholly wrong because, during the beginning of World War 1, the great scientist Albert Einstein proposed a revolutionary theory of General Relativity.
This theory applies to the whole Universe and depicts a simple fact; If Gravity is produced out of Mass, and Gravity gives birth to Motion, then the Universe filled with an infinite number of objects must be having some sort of Ruction in this process; either contraction or expansion.
So the question was, what was that Ruction?
Well, the world got its answer in 1929, when American Astronomer Edwin Hubble observed that many Galaxies were going away from each other, and this, in essence, is what we meant by the expansion of the Universe; an Increase in distance between the Galaxies.
But this is precisely the problem. So looking at this observation, scientists assumed that if the particles are going away from each other, then there must have been some explosion in the past, due to whose force this expansion is taking place.
Yes, we are talking about Big Bang! The great scientist Stephen Hawking proposed the apparent explosion responsible for the creation of the Universe.
But, Big Bang is only partially accepted creation theory. Two more creation theories negate the Big bang theory completely.
First, a repulsive force like Dark Energy is responsible for the expansion of the Universe. Second, the Cosmological Principle, which states that the Universe is equally dense and distributed in each direction.
See, if we say that an invisible Dark Energy is pushing away the Stars and Galaxies from each other, then we don’t need the Big Bang explosion theory (that we discussed above) at all. And if you still firmly insist that the Big Bang Explosion took place, why does the Universe appear equally dense and distributed in the Cosmic Microwave Background?
Suppose Cosmic Microwave Background radiation represents the initial heat of our Universe; then how did this heat energy distribute so fast in this Universe which is expanding more quickly than the speed of light? Why didn’t it dissipate up till now?
It is possible that several Big Bang Explosions had happened in the past, which is why the heat didn’t dissipate in all the places.
Well, all these scenarios point towards only two things; Either our Universe is the result of multiple Big Bang explosions, or it didn’t begin with a Big bang explosion in the first place. And this means only one thing; there is no edge of the Universe.
The Universe is expanding with the speed of light without compromising on its density and distribution, which means there is no end to it; no matter how much you travel forward in the Universe, you will never reach its edge.
Do you have your own concept that gives a whole new direction to the theory of the edge of the Universe? Let everyone know by commenting below!