The 10 Dimensions of the Universe Usually when someone mentions “dimensions” we tend to think of something abstract like a parallel universe with alternate realities. However, dimensions and their role in our universe is quite different. Dimensions are just the aspects of what we consider to be reality. We are already aware of the three dimensions we experience on a daily basis. We see these dimensions as the length, width and depth of every object in our universe. Part of the String Theory states that our universe that we observe is just a small part of a larger space with many dimensions than the three we can already see.The Three Dimensions We KnowThe first dimension can be defined as having length only, no width or depth. A one-dimensional object can be described as a straight line that connects two point of no length, width, or depth. Add to it another point, and line that connect that point to our previous straight line, we enter the second dimension. The object we just created is two-dimensional and now has a length as well as a height. The third dimension includes depth. A cube is an example of a three-dimensional object that has length, width, and depth. A cube thus has a volume. These three dimension are very apparent to us because we can physically see them whereas the other seven aren’t. The Fourth Dimension Space time is the fourth dimension. So what does that mean? The fourth dimension allows for the third dimension to change. We can say that the fourth-dimension connects us one minute ago to us now, or the big bang, the beginning of our universe, to the end of our universe. This is obvious when we say that the third dimension is space without time. The fourth dimensions adds duration to the third dimension. It’s important to remember that no dimensions exist alone. We can’t make a one-dimensional line without using points. We can’t make a two-dimensional plane without using lines. We can’t make a three-dimensional space without using planes and we can’t make a fourth-dimensional duration without multiple plank-frames of three-dimensional space.The Fifth DimensionIn our universe, we are moving in one direction called time. So what is the opposite of this direction? Anti-time is just as real as time. All spatial dimensions have two opposite directions. Stephen Hawking said, ‘One can think of ordinary, real, time as a horizontal line. On the left, one has the past, and on the right, the future. But there’s another kind of time in the vertical direction. This is called imaginary time, because it is not the kind of time we normally experience. But in a sense, it is just as real, as what we call real time.” To visualize the extra dimensions, Hugh Everett’s many-worlds interpretation states that as observers, we can only see one of universe at a time although other universes are equally real. According to the theory of Everett’s universal wave function, we can’t see any of the other universes because they exist transversely to the ones we are observing an any particular instant. So why can’t we see the fifth dimension? When standing in front of a building, we can only see what’s in front of us. We can’t see the back of the building, not because the back of the building isn’t there, but because it is impossible to see from our current frame. The fifth dimension consists of every possible state of universe which can be connected to our “now” and if we were to ever see the fifth dimension, we would be observing possible worlds slightly different from ours. The Sixth Dimension We exist anywhere between the big bang, when our universe was created, and the end of the universe. Between when the universe was created to “now” to the end of the universe there exists a one-dimensional line of the fourth-dimension, space time. But what if there was another version of “now” where dinosaurs don’t go extinct or another version of “now” where the moon was never created? We can theorize an infinite amount of one-dimensional lines that connect the beginning of the universe to any possible “nows” to the end of the universe. The sixth dimension is a phase space of the many parallel universes derived from the unique initial conditions of our universe. A phase space is a space in which all possible states of a system connects to one unique point in the phase space. In the sixth dimension, we can see ways to different possible worlds and universes but all starting from one initial position or condition that is the big bang. The Seventh and Eighth DimensionIn the fifth and sixth dimension, the many possible parallel universes branched out from a single initial condition. In the seventh dimension, from the beginning of time, everything is different. The seventh dimension allows us the access all of the possible universes that begin with different initial conditions. We know that the fourth-dimension allows us to create a one-dimensional line, time, that joins the big bang to one possible ending of our universe. As we imagine the seventh dimension, we should think of the sixth dimension as a single point consisting of the infinite number of possible timelines of our universe derived from the bigbang. But there isn’t just one point. There are many points of different infinities that can be connected where the start and end of the universe are different. The eight dimension shows us possible universe histories that begin from different initial conditions and branches out to an infinity of possible worlds.The Ninth and Tenth DimensionIn the ninth dimension, we can imagine different possible worlds and universes in terms of the laws of physics. For example, we can compare our universe with gravity to another universe with a different version of gravity. In the ninth dimension, we can compare our universe to other universes with different values of the speed of light. In the tenth dimension, we come to a space where every possible reality is covered. We cannot imagine beyond this point or conceive any information in terms of dimensions.The first three dimensions are easy to perceive because we experience them on a daily basis. So why do we need the extra six dimensions? After looking at each dimension, the arguments always come to: “what is missing in this dimension? What is beyond this dimension? We may think that all we need is the first three dimension and maybe the fourth dimension of space time because in every universe they exist but scientist believe there is always a need to be able to imagine something that we can’t posses in the previous dimension. Using telescopes, scientists can peer back into time to spot light from our early universe and see how extra dimensions have affected the growth of the cosmos. These ten dimensions were theorized to explain how the forces of our universe work and how other possible universes can work.