In this blog, we are going to see the things which exist outside our observable universe.
Table of Contents
Introduction
Before knowing what is outside the universe first, we have to know about our universe, and where our universe is spread which means the boundary.
Most people/scientists/researchers believe that the size of our observable universe is extended to 13.8 billion light years, this was stated or calculated because the big bang happened before 13.8 billion light years. The main thing is that we have some idea about what exists between our observable universe, but no one knows what exists after our observable universe man we don’t know clearly but we have predicted that after our observable universe there might be aliens, the great filters or another dimension, in this blog we are not only going to know about our observable universe but also about the things after our observable universe with some speculations.
What is the observable universe?
Before going to know about what is outside of the observable universe it is more important to know about what the observable universe is, in simple terms observable universe is the space in the entire universe that we can see or discover from our planet earth in simple terms what we can see from our planet earth is called observable universe as the name says observable.
How we see our universe
The basic thing from which we see our universe is the light emitted by the particles or objects then the light is received by our space telescopes or observatory systems. let me explain to you with an example assume that if we see an object from earth towards an object which is 13.8 billion light-years far from us then it doesn’t mean that the object is present there now rather than we only see the state in which the object was
The basic thing from which we see our universe is the light emitted by the particles or objects then the light is received by our space telescopes or observatory systems. let me explain to you with an example assume that if we see an object from earth towards an object which is 13.8 billion light-years far from us then it doesn’t mean that the object is present there now rather than we only see the state in which the object was 13.8 billion light years before. This phenomenon occurs only because we didn’t see the object in real, we only see the light which was emitted by the object before 13.8 billion light years.
The misconception arises here because many people think that the universe existed for 13.8 billion light years so we can only see till there and they assume that the observable universe radius is 13.8 billion light years.
Reality
As we discussed above the misconception of the figure of 13.8 billion light years even does not come close to it and the simple reason is that the universe is expanding every second. We know that on average every megaparsec universe expands at a rate of 73 KM/s. Wia simple calculations, we can predict the real size of our universe by multiplying 73KM/S by 13.8 billion years.
Some astrophysicists also predicted that the expansion rate of our universe need not be constant it may also accelerate with time. If we perform calculations with the help of the current data, we can predict the size of our observable universe and the size of our observable universe is 46.508 billion light years in simple words if we want to know about the edge of our observable universe then we have to look back nearly 46.508 billion light years away, because of the rate of expansions the predicted distance can vary from time to time because it is not constant.
Edge of the universe
After knowing all this information, a question arises in our brain can we go to the edge of the universe and see what is after our observable universe, for this, we have only two ways to know or to see what is after our observable universe.
Possible ways:
- Travel with more speed of light.
Here more means a big number or figure let me help you with some facts like the global average life expectancy of a human is 72.74 years only which means that if a spacecraft is sent towards the edge of the universe, then a 55-year human can reach the edge of the observable universe and to cover this distance a spacecraft should travel with 8000000000 light years speed, till now in the entire universe there is no possibility to do this operation, so let’s have a look on the second possibility.
2. Travel through warm holes
This method was chosen because wormholes act like tunnels in our universe, again the problem is the topic of wormholes are still a hypothesis and even we don’t have any proof. Because of this problem once again this method is also gets failed.
By seeing this we can pride ourselves that humans can never reach the edge of the universe, don’t worry if we don’t have the possibility then we have theories that predict what can be there.
The great filters
The Great Filter is a fundamental theory that holds that every planet with the correct circumstances for life would ultimately produce intelligent life forms that will attempt to colonize other planets in the future. This notion might appear hazy at first, but if you attempt to look at this situation more closely, you will notice that it does have some basis in reality.
The Fermi Paradox, which establishes the groundwork for The Great Filter, must first be understood.
According to basic probability, there must be extraterrestrial life someplace else in the universe. Surely there would have been some indication of life if such were the case? But we never have, and we never will. Even though the universe is home to trillions of stars and billions of galaxies, it nevertheless appears to be eternally empty and void-like to us.
Theories
As we mentioned above, we don’t have any proof, but we have some theories by which we can predict what is after the edge of the universe.
THEORY NUMBER ONE:
According to theory number one, it says that there should be a Hubble volume.
If we simplify and say what is Hubble volume, then it can be stated as” it is a spherical form of our whole observable universe”.
for example Cosmic microwave background [CMB]
if we put the actual image of the universe in cosmic microwave background then it will be considered as a Hubble volume.
According to this theory if we cross the edge then also, we will see the same thing outside.
THEORY NUMBER TWO:
According to theory number two outside our observable universe, there exist several parallel universes.
Let me explain to you with an example if you have watched the Marvel What if series there you have noticed that after the edge of the observable universe there was a passage where other universes exist it shows that after crossing our observable universe we can see the great filter, it is impossible to cross the great filter and if somehow, we could cross the great filter we will find the entire truth of our universe.
A bold statement was made by physicist Lee Smolin of the perimeter institute for theoretical physics stated that” our universe could be nothing, but an organized matter set in a black hole
If you connect the dots from creation to cosmology, there are three reasons
Reason number 1: With our current understanding the existence of our universe was from a big blast named the big bang and surprisingly supernova which is a blast itself by which black holes are created.
Reason number 2: No one knows where the matter of a black hole goes since we have discovered several black holes which have absorbed a huge mass into it, it can’t happen that it absorbs mass, and the mass is int stored anywhere number of people believe that from the initial stage the matter is stored.
Conclusion
If we connect all the dots, we conclude that there is a big possibility that whenever a black hole is formed it connects itself with space, and, whenever matter goes inside the black hole then the matter is teleported into space and after several matters are collected in the space it becomes a universe itself, if this is true then whom we consider as a black hole might be a wormhole. If this is true, then think that how many universe passages exist in our universe itself.
FAQ’s
What is the universe?
The physical universe is defined as all of space and time (collectively referred to as spacetime) and their contents
What is a light year?
A unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 million miles)
What is the observable universe?
The observable universe is a ball-shaped region of the universe comprising all matter that can be observed from Earth or its space-based telescopes and exploratory probes at present because the electromagnetic radiation from these objects has had time to reach the Solar System
4. What is the age of our universe?
The age of the universe based on the best fit to Planck 2018 data alone is 13.787 ± 0.020 billion years.
5. What is a megaparsec?
A unit of measure for distances in intergalactic space equal to one million parsecs.
6. What are theories?
A supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
7. What is the great filter?
The Great Filter is one possible resolution of the Fermi paradox.
8. What is the Fermi paradox?
The Fermi Paradox refers to the dichotomy between the high probability that extraterrestrial intelligence exists and the fact that we have no evidence for such aliens.
9. What is a black hole?
A region of space has a gravitational field so intense that no matter or radiation can escape.
10. What is a wormhole?
A wormhole is a speculative structure connecting disparate points in spacetime and is based on a special solution of the Einstein field equations.
