
Wormholes are very interesting things, they are feasible solutions for the equations of Einstein, the evidence of the existence of blackhole is very strong, so, why not think seriously about Wormhole?
Our Universe stayed three-dimensional for thousend of years, then, Einstein, introduced the space-time and now physicist speak about 10 or even 11 dimensions and they tell us about other universes. wormhole, then, gain importance not only theoretically, but practically also, because they can be the connections to those other universes, and they can be the way to travel to stars and visit other planets.
Time is defined as being the fourth dimension of our universe. The other three dimensions are of space, including up-down, left-right and backward-forward. Time cannot exist without space, and likewise, space cannot exist without time. This interconnected relationship of time and space is called the spacetime continuum, which means that any event that occurs in the universe has to involve both space and time.
When Albert Einstein released his theory of special relativity, he laid the foundation for the theoretical possibility of time travel.
According to The Theory of Relativity gravity bends space time around it. What it means is that, light which is said to have linear propagation (straight line) follows a distorts its path in presence of a massive body. Actually light always follows a straight path,but its the space that bends.
Any body which has mass produces a distorting in space time due to its gravity. Because of this distorting objects that were supposed to move in a prescibed path bends towards the massive body.
This is not just a theory, it has been proved and actually we are making use of this principle for a lot of applications like finding the mass of stars etc.
This was proved way back in 1919, by none other than Albert Einstein during a solar eclipse.
During the eclipse we could see the stars lying closer to the path of sun ( they cannot be seen otherwise due to the brightness of the sun). We knew the actual postition of these stars, but the gravity of sun caused a deviation in the path of light from them making them appear a bit closer to sun. Thus Einstein’s theory was verified.
This effect is prominent with bodies with high gravity like black holes.
When stars that are more than four times the mass of our sun reach the end of their life and have burned up all of their fuel, they collapse under the pressure of their own weight. This implosion creates "black holes", then a black hole is what remains when a massive star dies. The core's gravity is so strong that even light cannot escape.
This object is now a black hole and literally disappears from view. Because the core's gravity is so strong, the core sinks through the fabric of space-time, creating a hole in space-time -- this is why the object is called a black hole.
The core becomes the central part of the black hole called the singularity. The opening of the hole is called the event horizon.
You can think of the shape of a black hole as similar to an ice cream cone. It is large on top and tapers into a point, called a singularity. At the singularity, the laws of physics cease to exist and all matter is crushed beyond recognition. This kind of non-rotating black hole is called a Schwarzschild black hole, named after the German astronomer Karl Schwarzschild.
There are then two types of black holes:
- Schwarzschild (Non-rotating black hole)
- Kerr (Rotating black hole)
While writers have produced some great ideas for time machines over the years, a real-life time machine has yet to be built. Most theories of time travel don't rely on machines at all. Instead, time travel will likely be done by way of natural phenomena that will transport us instantly from one point in time to another. These space phenomena, which we are not even sure exist, include:
- Rotating black holes
- Wormholes
A rotating black hole is another type of black hole, called a Kerr hole, is also theoretically possible.
In this case, the singularity isnt a point as in non rotating ones but has a ring shaped form.All the matter that is sucked into the black hole will move towards it. But unlike a point singularity, where upon reaching it the matter will be completely destroyed, here it will be thrown out of the worm hole through an opening called the white hole.
While the black hole forms one end of a wormhole, the white hole forms the other end. Its properties are just the opposite of black hole. It throws every thing out and doesnot allow anything to enter it.
Kerr holes are rotating black holes that could be used as portals for time travel or travel to parallel universes.
In 1963, New Zealand mathematician Roy Kerr proposed the first realistic theory for a rotating black hole. In his theory, dying stars would collapse into a rotating ring of neutrons that would produce sufficient centrifugal force to prevent the formation of a singularity. Since the black hole would not have a singularity, Kerr believed it would be safe to enter it without being crushed by the infinite gravitational force at its center.
If Kerr holes do exist, it might be possible to pass through them and exit out of a "white" hole. A white hole would have the reverse action of a black hole. So, instead of pulling everything into its gravitational force, it would use some sort of exotic matter with negative energy to push everything out and away from it. These white holes would be our way to enter other times or other worlds.
Theoretically there could be another type of tunnel-like structure existing in the universe that could be used for a time travel portal. Wormholes, also called Einstein-Rosen Bridges, are considered to have the most potential for time travel if they do exist.
Not only could they allow us to travel through time, they could allow us to travel many light-years from Earth in only a fraction of the amount of time that it would take us with conventional space travel methods.
Wormholes are considered possible based on Einstein's theory of relativity, which states that any mass curves spacetime. To understand this curvature, think about two people holding a bed sheet up and stretching that sheet tight. If one person were to place a baseball on the bed sheet, the weight of the baseball would roll to the middle of the sheet and cause the sheet to curve at
that point. Now, if a marble were placed on the edge of the same bed sheet it would travel toward the baseball because of the curve.

In this example, space is depicted as a two-dimensional plane rather than the four dimensions that actually make up spacetime. Imagine that this sheet is folded over, leaving a space between the top and bottom. Placing the baseball on the top side will cause a curvature to form. If an equal mass were placed on the bottom part of the sheet at a point that corresponds with the location of the baseball on the top, the second mass would eventually meet with the baseball. This is similar to how wormholes might form.
In space, masses that place pressure on different parts of the universe could eventually come together to form a tunnel ... this is a wormhole. It can connect two distant parts of a universe or even different universe. We could then travel from Earth to another galaxy and back relatively quickly (within a lifetime). For instance, let's picture a scenario in which we would want to travel to Sirius, a star that's seen in the Canis Major constellation just below Orion. Sirius is about 9 light-years from Earth, which is about 54 trillion miles (90 trillion km). Obviously, this distance would be far too great for space travelers to traverse and return in time to tell us about what they saw there. So far, the farthest people have traveled into space is to the moon, which is only about 248,548 miles (about 400,000 km) away from Earth. If we could find a wormhole that connected us to the space around Sirius, then we could cut the time considerably by avoiding the trillions of miles that we would have to cross with traditional space travel.
So by connecting two different places, wormholes provide a better and much faster transportation system. But how far is it really possible?
The inside of a worm hole is highly sensitive. Even a miniscule disturbance can cause it to break down,So how can we travel through it without causing any disturbance? One way is to use a really large wormhole so that our passing through will not produce a notable disturbance.
Another thing is that, once we are inside the black hole, we will be torn into pieces and reassembled in the white hole. It is clearly shown in Jet Li’s Sci Fi movie The One in which when he is transported to another universe, this body is torn to pieces.
An interesting theory regarding time travel brings up the idea of parallel universes, or alternative histories. Let's say that you do travel back to meet your grandfather when he was a boy. In the theory of parallel universes, you may have traveled to another universe, one that is similar to ours, but has a different succession of events. For instance, if you were to travel back in time and ravish one of your ancestors, you've only ravished that person in one universe, which is no longer the universe that you exist in. And if you then try to travel back to your own time, you may end up in another parallel universe and never be able to get back to the universe you started in.
The idea here is that every action causes the creation of a new universe, and that there are an infinite number of universes that exist. When you ravished your ancestor, you created a new universe, a universe that was identical to your own up until the time you changed the original succession of events.
My point of view is that the wormhole is better as a shortcut for traveling the enormous distances from Earth to stars, even when it imply a travel in time also. Wormhole can not only be used to travel in time, but also to travel to another part of the universe. Many years will be passing until we can really understand first, how the Universe work and then, the manner to manipulate the wormhole, because until now they are only a pretty mathematical conjecture. We have, before, to know, really, how Universe works and how it starts, until that time, there is no reason to speculate about worm hole construction and usage, nor in a time machine.
“The reason why the universe is eternal is that it does not live for itself; it gives life to others as it transforms.” Lao Tzu