According to superstring theory, there are at least 10 dimensions in the universe (M-theory actually suggests that there are 11 dimensions to spacetime; bosonic string theories suggest 26 dimensions).
That’s a bit of a mind-boggler: Most people understand the basic three dimensions, and many know that the fourth dimension is probably time. But what, exactly, are full 10 dimensions?
•The First Dimension: Length
~The first dimension is length, or x-axis—a straight line, with no other characteristics.
•The Second Dimension: Height
~Height, or y-axis, can be added to the length to produce a two-dimensional object, such as a triangle or square.
•The Third Dimension: Depth
~Depth, or z-axis, can be added to the previous two dimensions to produce objects that have volume, like a cube, pyramid, or sphere. This is the end of the dimensions that are directly physically perceptible by human beings. All dimensions beyond the third are theoretical.
•The Fourth Dimension: Time
~The fourth dimension is the position in time occupied by a three-dimensional object. •The Fifth Dimension: Possible Worlds
~The fifth dimension is a world slightly different than ours, from which we could measure similarities and differences to our own world. •The Sixth Dimension: A Plane of All Possible Worlds With the Same Start Conditions
~The sixth dimension is a plane containing all possible universes with the same start conditions as ours; i.e., the Big Bang.
•The Seventh Dimension: A Plane of All Possible Worlds With Different Start Conditions ~The seventh dimension expands upon the sixth by plotting all possible worlds that begin with different start conditions •The Eighth Dimension:
~Plane of All Possible Worlds, Each With Different Start Conditions, Each Branching Out Infinitely
•The Ninth Dimension: All Possible Worlds, Starting With All Possible Start Conditions andLaws of Physics
~In each of these dimensions, which represent all possible start conditions, the laws of physics are all completely different. •The Tenth Dimension: Infinite Possibilities
~At this level of complexity, everything that is possible and imaginable exists.