What is Space and Universe?

The Myth

Space seems to be all the empty place around us. The space that we cannot see is what we know about it. Seems quite confusing answer to this but you will know what I mean.:) What our intuition says about the space and universe and their relation could be a great truth for you but believe me there are a lot of "stuff" out there in the universe, which would really amaze any person when told about it. And what you think you know about this may be just the myth in real science because of the complexity of this vast place all around us which make us feel like to be a very infinitesimal.

Universe is empty space where there are stars, planets, moon, other different heavenly bodies, huge dust particles and a lot more.But there is a problem when I just say this. Because there are trillions and trillions of other different things on the same universe which we can never imagine of.  People think or lets say that myth tell us that there's no gravity in space, or there are very less mass in the space, or we can also say the things about heavens and Gods are in Universe too. And they turns out to be a very popular myth indeed or that the misconception that a lot of people may bear, "space and universe is same thing". But there are a lot of fascinating, and hallucinating  facts and there occurs some serious phenomena that is really hard to explain.

I, at this point of time of time also consider the questions like, What happened "before" big bang(if you believe that really happened)?

"A lot of people out there may have a lot more things in their mind and there might be a lot of expectations to learn from these kind of blogs. I will just try to share my knowledge based on readings and studies, then will go the logical conclusions based on the evidences, from what I read prior to writing this blog and what scientists all around the globe have been finding for all these times."

Current Knowledge Of Universe...

From the point of Issac Newton's time to the Albert Einstein's time, there had been a lot of confusion and a lot of studies in this field(By this I don't mean to say that it is less now, but in fact it has been heating up ever since). A lot things, mysteries, laws of nature were resolved by 17th Century Genius -- Issac Newton. But later Albert Einstein, the current time genius came up to show that many things Newton Showed were either incomplete or incorrect. By this I don't mean to say that what Mr. Newton did was incorrect. In fact Issac newton was one of the greatest genius mind ever lived. He was such a great mathematician and scientist that even though he had a very few options with mathematics in his time, he CREATED those required knowledge himself and solved almost all the fundamental problems that people had never been thinking before and started the modern era of science.And according to my personal belief, if he would have been born at the same time of Einstein, he would have been able to do the same thing that Einstein did.

Einstein main work which are referred to "Special Theory Of Relativity(1905)" that refer to especially to the high speed facts and "The General Theory of Relativity(1915)" that especially is focused on the gravity and its property( We will come to this property and theories in later blogs). And the special about these theory is that, they can tell you a lot about the entire nature of universe. Being unsuccessful on completing the Unified theory of the universe, that would actually tell us about all the phenomena that occurs around us in an level of elementary level from a single equation, he still holds the key to the modern physics and knowledge to the modern universe, or it would be better to say modern knowledge to the universe.

At this time we know many things about universe which may not be even a very small fraction of knowledge that we are yet to get because it is completely filled with mysteries.But there is a hope for what we think to be the end of theoretical physics. Since a long time( basically after Einstein incomplete work on unified theory of universe) scientists and physicist around the globe have been trying to combine the two most crashing( opposing) and proved to be true on individual experiments for a long time which are the general theory of relativity and the quantum mechanics. So the work on progress is called the superstring theory or the latest development in this theory have named this to me the M-Theory( where some say M stands for master, or mother or more scientifically its called membrane theory).
  

As I mentioned before, many people may consider saying universe and space as a same thing. Let me just clarify this misconception. For this purpose, I will take an example of a balloon. So here the universe is the all balloon that we see from outside but the space is just the air inside it. We would never be able to see the universe because for that we need to move out of this whole universe and look at it like what we did when seeing the balloon from outside. And scientifically it would be only possible only when we move "out of this universe WHICH again should be done my moving out the spatial dimension of spacetime( more on this on later blog).

So, to put the contrast on above things I would be talking about the next dimensional level for us in the next article. After that I will go through the universe and in this way I would be gradually increasing the level of posts in this blog and will update as frequently as possible with error corrections and your suggestions.

The Concept of Fourth Dimension

The Concept of higher Dimension

Its all about geometry and grasp of knowledge of complexity when we come to this point of discussion. Let me just clarify that the universe that we observe is a three dimensional universe but what we live in is called the spacetime because the dimension of time is added in the same space we live in which have only one dimension for us. And if you do not understand what that means, then  I will just mention it next.

Draw a line or a curve in a piece of paper. In which ever way you bend that line in that paper, that is still called a one dimensional. This is because, when we consider a universe which have a single dimension, a single line, then the "things" in that universe are restricted to anywhere but along the line in a same path. They can only travel back and forth even though their way may be bent or straight. So, that is called one dimensional space.

Now you paint something on a paper, or draw something that have a shape, maybe circle or square or some random picture, then that picture is said to have a two dimension. Let us consider a paper for example. And let us consider there are drawing of peoples. So if somehow those peoples are made to move in there, we can see that they can move up, down or left, right. They need to have a eye and mouth on both of their side to see and talk on both sides. They will be restricted to move out of the paper because, for them, "out of the paper" does not exists at all because they are fixed in that surface of paper and Since they can now move in two lines of up-down and left right, they are said to be in two dimension space.

Now when you make a sphere or a box out of that same paper, it turns out to have a 3 dimensions. That means, if some creatures live inside that sphere, they can actually move up, down or left, and back and forth, like we do. We can move east and west or north and south in earth or above or to the surface, but there is no other way in which we can move on our will. Or, it would also be good to say that, we won't be able to imagine something that would move in other direction, other than the direction or combination of directions mentioned above, since we live in a space of three dimension.

And another interesting fact about all those directions mentioned is that they all are mutually perpendicular to each others. And they are called as X-axis, Y-axis and Z-axis in Geometry. So, if we could imagine another dimension like this which would be called another spatial dimension( or the fourth spatial dimension) then it should be perpendicular to these three dimensions, which seems quite impossible for us to imagine at this moment. Because imagining something is making a visual picture in your mind. But since our mind and we live only in a three dimensional space it is impossible for us to imagine it because we never have the perception through our eyes to something like that before.

These are the four dimensions as we know now. But these days many physicists and Mathematicians around the globe are working on the a very strong and possibly the final theory in nature which is called the super-string theory now developed to M-theory where some people call M to be Mother or Master theory because it seems like it is the most basic theory of nature that outstandingly unifies the two great pillar of modern physics which are "Quantum Mechanics" and the very special  "General Theory of Relativity". And the best thing is it defines that the other dimensions are are within our own dimensions but are curled so highly that they only seem like a string. And this theory of everything says that these strings(by the way there are 10 dimensions like that according to superstring theory) dance over another dimension called the Membrane because this 11th dimension is like a membrane for other dimensions of strings. So, it is now called the Membrane theory.