Hearing the prompt of the battleship's main control quantum light brain, Fang Xu and everyone entered their respective safety cabins in turn, a rugby-shaped device that looked like an oblique position, and at the same time remembered the relevant knowledge and concepts of warp sailing.

Warp speed navigation was originally derived from the "four-dimensional space" model proposed by Albert Einstein, a great scientist in the earth era.

As we all know, the plane of two-dimensional space will be bent towards three-dimensional space, that is, towards the y-axis of the three axes of three-dimensional space xyz, then a sphere will eventually be formed.

Einstein's four-dimensional space model pointed out that the three-dimensional space in which human beings live will also bend towards the four-dimensional space in the same way that the two-dimensional is bent to the three-dimensional, of course, towards the fourth dimension, the time dimension.

We can imagine that when the three-dimensional space is bent towards the time dimension of the four-dimensional space, a sphere will be formed, of course, this is only imagination, a metaphor that is not very appropriate, but it is relatively close.

Because four-dimensional space cannot, of course, be a sphere.

The sphere is only a substance that exists in three-dimensional space, but human technology in the galaxy era cannot reveal the four-dimensional space, and the essence of life in three-dimensional space is three-dimensional life, in any case, it is impossible to understand the form and meaning of four-dimensional existence.

However, for the sake of easy understanding, the great scientists of mankind have made such a hypothesis and simulation.

What's more, although the specific existence form of the four dimensions is not understood, through the mathematical model of human beings, it is completely possible to calculate various data related to it.

This also provided a solid theoretical foundation for the birth of warp sailing.

Back to the beginning.

The theory of warp speed navigation is that the three-dimensional cosmic space in which human beings live will bend towards the fourth dimension of time, or the axis of time, to form a sphere.

If you roughly simulate it, you can think of the surface of this sphere as the three-dimensional space that humans are in.

Next, it's easy to understand.

Assuming that there are two points A and B on the spherical surface, corresponding to the three-dimensional universe, planet A and planet B, which are 90 million kilometers apart, and the flight speed of an ordinary space battleship is 100,000 kilometers per second, which is about one-third of the speed of light, then normal space voyage, from planet A to planet B, obviously takes at least 900 seconds.

Warp speed navigation means that when the warship takes off from planet A, it opens the space wormhole with sufficient and powerful energy and enters the second subspace in the sandwich between the three-dimensional space and the four-dimensional space, which is often called subspace.

The battleship appears at the point in subspace, corresponding to planet A, and is denoted as point A for ease of understanding.

Note!

Because suppose that when the three-dimensional space is bent towards the fourth dimension of time, it will form a sphere, and the time dimension exists as the axis of the sphere, that is, the time axis, so point A is actually inside the sphere and is on the same time axis as planet A.

By analogy, on the spherical surface where point A is located, there is also point b corresponding to the outermost surface of the sphere, that is, planet B in three-dimensional space.

ab is inside the sphere, and AB is on the outer sphere, so the distance between abs is much smaller than AB anyway.

Assuming that AB is 18 million kilometers apart, then at the speed of 100,000 kilometers per second of the battleship, it only takes 180 seconds to successfully reach point B from point A.

At this time, the battleship only needs to use the same way to enter the subspace, open the space wormhole, and return to the three-dimensional space again, and then appear on planet B.

At this point, the whole warp speed sailing process is complete.

The actual distance of planet AB is 90 million kilometers, and excluding the time spent in and out of subspace, the space battleship actually only takes 180 seconds to reach star B from star A, and its actual speed can be considered to be 500,000 kilometers per second.

The speed of light in a vacuum is about 300,000 kilometers per second.

Obviously, the speed of the battleship far exceeded the speed of light throughout the warp voyage, which greatly reduced the distance between the AB planets.

Of course, the galaxy age is extremely technologically advanced, and although warp speed navigation is classified as faster-than-light navigation, in practical terms, it is more appropriate to call it a space jump, because with the development of technology, the more powerful the energy excited by the battleship when it takes off, the deeper the subspace level it enters, and the faster the warp speed will be.

In warp navigation theory, three-dimensional space is bent towards the time dimension to form a sphere.

In fact, when the technology reaches a certain level, the battleship will be able to enter the deepest part of subspace, which is the axis of the timeline, assuming the position of the sphere's sphere.

In this way, the battleship only needs to enter and exit the subspace once, and it can jump from one point to another in an instant.

In a nutshell, it's an instantaneous jump, or spatial teleportation.

Of course, with the current technology of human beings, it is far from being able to do this, and the current warships can only enter a relatively shallow subspace, and it takes a lot of time to sail in it, although it is faster than light, but there is still a long way to go before the real space jump.

"It's a pity that the current human race is only a fourth-level civilization, although it has reached its peak, but the scientific and technological barriers are very solid, if it can't break through to the fifth-level civilization, many aspects of the theory can't be broken through, and the practical application can't be achieved, I don't know when the Dao will be able to achieve the real instantaneous space jump." Fang Xu thought.

There are actually different types of faster-than-light travel.

One is warp sailing, which is only done between galaxies.

The communication between the planets within a separate galaxy does not require the use of warp speed navigation, ordinary faster-than-light cruising is sufficient.

This is not only due to the relatively limited space inside the galaxy, but also because, with the current human technology, the energy required to travel at warp speed is too large.

If it's not between galaxies or even star fields, sailing at warp speed is definitely a huge waste of energy.

In fact, generally speaking, once a warp speed battleship enters the subspace, after spending a certain amount of energy to advance the warship to a certain speed, it will rely on inertia to continue flying, and then begin to recharge for a long time, waiting to reach the destination, communicate with the external warp speed base, echo inside and outside, and stimulate huge energy to open a space wormhole.

Energy issues are also an obstacle to limiting the art of warp navigation.

In subspace, warp speed warships generally do not push up to the limit speed that the battleship can reach, because it also consumes a lot of energy, and it is futile to reach the corresponding point of the target in subspace too quickly, and it is futile to open the space wormhole without enough energy.

More often than not, warp speed battleships rely on internal elemental decay reactors in subspace to continuously generate and store energy in preparation for leaving subspace.

As for ordinary faster-than-light cruises, although they also need to open a space wormhole, what they enter is a shallow subspace, which is almost a layer of different space floating on the surface of three-dimensional space.

In it, all the physical rules of three-dimensional space do not apply, and there is no limit to speed, only the technique is required to achieve it, and it can be continuously accelerated, and it is simply easy to exceed the speed of light.

However, with the current human technology, ten times the speed of light is already the limit, and it is impossible to increase it again.

And only some of the most advanced space warships, transport ships, etc. have such a function, ordinary faster-than-light spaceships, that is, five or six times the speed of light.

But even so, it is extremely convenient to fly between galaxies, and the time it takes to travel to and from major planets is measured in hours, which is about the same as taking various advanced means of transportation to and from major cities in the Earth era.

Of course, excluding the energy consumption, faster-than-light cruising and warp cruising are still incomparable, and the latter is obviously more advanced.

For example, the first level of warp speed is the speed of vacuum light, but the second level of warp speed is a full 10,000 times the speed of vacuum light, and the third level of warp speed is close to 40,000 times the speed of vacuum light, which is almost a geometric progression.

From this point of view, what human civilization will popularize in the future will inevitably be warp speed navigation rather than superluminal navigation.

Once the technology is developed and the huge problem of energy loss of warp speed navigation is solved, the former will inevitably replace the latter, even if the navigation within the galaxy will also use warp speed navigation.

After all, the speed of the ten-level warp is almost 200,000 times the speed of light, and it only takes less than three hours to cover the distance of a light year.

And when the warp speed navigation technique continues to develop and reaches its peak, which is the legendary level of instantaneous space jumping and teleportation, the daunting astronomical unit of light year is no longer terrifying.

Because theoretically speaking, whether it is more than ten light years, hundreds of light years, or thousands, tens of thousands, or even hundreds of thousands, millions or even more distant, as long as the relevant techniques break through and mature step by step, no matter how far away they are, they can travel in an instant without obstacles.

That was, of course, years later.

At least Fang Xu was a Ghost God Sword King in his previous life, until the civilization war broke out with humans and starry sky aliens, the instantaneous space jumping technique only existed in theory.

"The battleship is about to take off, and the safety cabin hypnosis guidance begins." There was a light brain prompt sound in his ears, and Fang Xu suddenly came back to his senses and immediately calmed down.

The king's state of mind dominates, and his mental power fluctuates, constricting into the depths of his mind and the space of consciousness in an instant, and he is completely silent.

The reason why all passengers need to go into a deep sleep when warp speed sails and takes off is because the moment the space wormhole is opened, it will produce an extremely terrifying violent energy reaction, especially the space energy, which will fill the entire battleship.

And at this moment, if a person is awake, then the spiritual consciousness will be pulled out of the physical body by the raging space energy, enter the void and shatter, die directly, and become a vegetative person, a walking corpse.

However, entering a state of deep sleep is different, and people's souls and spirits will be hidden deep in the depths of the physical body, in the Void World, and will not be disturbed by the material world.

But it is impossible for ordinary people to enter a deep sleep at will, at least to be able to do this only if they are a master of concentration. Therefore, the safety cabins are equipped with high-tech hypnotic guidance equipment to help passengers fall into a deep sleep.

Of course, Fang Xu is different.

He himself is a tenth-level spiritual powerhouse, and with the condensation of sword intent, he can completely control his own spirit, and there is no problem for his soul to hide in the void realm, and he can also stay awake and observe many changes in the energy of the outside space.

You must know that once a human being is promoted to a king, he has the ability to open a subspace and fly in it, which is comparable to a spaceship, and even as his cultivation becomes more profound, he can also enter subspace and jump in space like a warp warship.

However, it is all based on the comprehension of the laws of space and the control of space energy.

Although Fang Xu was proficient in spatial energy in his previous life, he had a limited comprehension of the laws of space, and now taking a warp speed battleship was a good opportunity.

Because the moment you open the spatial wormhole, the raging and violent spatial energy will produce a lot of changes, which is obvious and easy to perceive, which is very convenient for understanding.