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The future of space development. In modern times, there are private space travel agencies, etc., which are somewhat familiar, but it seems that it is quite difficult to aim for space from scratch.

"Oh, what the hell is that over there? It looks different, but what's that like?"

Still, Mira was looking around the development room full of intention to aim for the universe, and suddenly she saw it and asked with interest.

Rockets, artificial satellites, work drones, space station skeletons, and more. The monitor showed various things produced for research.

We can see that all of them are mostly equipment related to the universe. However, there was only one piece of equipment that was unknown.

"Huh? Which one is it?"

Look, it looks like a gateway to the demon world

It was on the monitor that Mira pointed out to me. It was a circle painted with machines and techniques.

Is it about one turn bigger than a person? The mysterious circle was sitting with an eerie presence. Even if it was a sacrifice, it would open the door to the demon world, and it was a surprising substitute.

Hmm? Oh, that's it.

Seeing that, Alat was a little bitter and convinced. And while continuing, "Well, it's definitely like the magic world," he briefly explained that it was also made as part of the research.

It wasn't connected to the demon world, but the gate was close.

"Soon... maybe!"

The universe and the gate. Mira knew what to associate with the two. That's already in the romance of my mind.

It would be no exaggeration to say that there is no longer an indispensable existence for science fiction based on the universe.

Yes, a device for traveling through the vast universe in an instant. An essential device for making the era of the great voyage of space a reality. It's an interstellar warp gate.

"You seem to know already." That's right! That's a time machine! "

Alat shouted, as if welcoming his comrades who were pursuing the same romance.

"... nh?"

"... eh?"

Instantly, Mira's face suddenly slid out, and Arato's expression in front of her was puzzled.

Hey, it was a mistake to be here.

No, no, it's the universe!? That's why it's called a gate, even if it's an interstellar warp!

"Wait, wait, wait, wait. The interstellar gate is a space ship." Then it can't be that small. You don't know if it's the size of this thing, or if it's anything else? If I had known, I would have thought enough of the possibility of a time machine! ”

There's a romance in the universe, two people who bump into each other.

Mira argues that it's a space development, so she thinks it's an interstellar warp gate.

In response, Arato argued that time machines are also a part of the universe, as theory of time warp using black holes suggests.

Then a dozen minutes later. While both remained unbroken, a change would come to the situation with the words Mira uttered.

── And how does that progress feel?

Interest in a time machine that has sprung up suddenly while arguing. Although it wasn't the interstellar warp gate I expected, the time machine was definitely a romantic mass.

Now the question arises as to whether it is really possible to do time-slip.

Next, we go to the past or the future. And I was wondering how long I could jump.

"I wonder if it's progress... mmmm, well, I don't know what to say.──"

Alat, who started with a bad reaction of tooth cuts somewhere, said that it is a technology that has not taken shape at all in modern times, and the results are refreshing.

"If you're going to go one-way into the future, you might be able to stretch the time to the extreme, temporarily stall it, and wake it up after ten years."

"Then it's not a time slip, it's like a cold sleep." It's a pattern that I often see in Sci-Fi. When I wake up, I feel like I've seen a story like the story of the destruction of civilization, which has been going on for a long time longer than I planned. "

"Well, empirically, it's like a time-slip. Then I'd like to call it a time machine... but I guess so."

The world of the future when you wake up. Whatever the process, if you look at the results, it looks like a time slip into the future. That said, Alat himself, who had spoken of the method, seemed to think it was a perverse approach.

Therefore, at the moment, the progress was almost zero.

"Why is that so?" I think there is something because I'm not making something that doesn't make sense. I don't know how many engineers there are.... well, it's even more of a fantasy in a time machine. It's the only place I can do anything about it.

While I admire the fantasy that games become reality, the existence of time machines seems to be more than that.

Then it is not surprising that so many brains and engineers have gathered without progress. Mira reacted in a convincing way, but it seemed that Arato was ungrateful.

“The machine is pure white, but the theory is definitely moving forward──!”

Alat, who had the tempers of not being able to return like this, began to speak in such a way as to be ashamed. Learn about time slippage and the issues that will be an obstacle in doing so.

According to Alat, the development of time machines has not progressed, but a number of related technical studies have been carried out.

The subject matter is the subject matter alone, and the field of research is multifaceted, which is why countless theories, inferences, and hypotheses are disorganized.

"One of the things I'm proposing is the theory of the common coordinates of the entire universe." This, to put it mildly, may be a sign of how difficult it is to succeed in time slips, unlike ideals.── ”

Alat's commentary, which began with such a foreword. It would have further accelerated even the confusing time machine debate.

Some say it's impossible to develop a time machine. And the reason for that is to define it as because no one is coming from the future on a time machine.

If the technology is far more advanced than it is now, it is not surprising that a time machine will be built in the far future. If that were the case, it would be possible for someone to come to modern times using it, but no such existence has been proven.

Therefore, it is one of the hypotheses that time machines cannot be done.

On the other hand, even if it is completed, there are various objections such as that it cannot come to the marginal earth on purpose, but it seems that it is not important.

It seems that the theory put forward by Alat suggests another possibility in that regard.

"──I thought so." Even if time-slip is such an anomaly, no matter how much technology you have, it has its limitations. In other words, I thought that even if I could, it would be limited in scale. That's why we can only deliver a certain mass. And now, after a successful time-slip, there will be a lot of restrictions.── ”

Arato's theory began with the assumption that time-slip was possible first.

He said that he was able to do time-slip, but that he proceeded to consider why there were no future people on Earth, or why there were no traces of them.

It seems that one of the reasoning that we assembled is the theory of the common coordinates of the entire universe.

"The first thing I thought about was, if this was the future planet, what would happen if we time-slipped to the same place 50 years ago?" When it comes to common time-slippers, the surrounding landscape changes, people suddenly show up, people are surprised, people stand out because of different clothes, and newspapers are happy to confirm success as they were fifty years ago──... well, I think there are various patterns, but there are many of them. However, I don't think it would be possible if it weren't for the fact that there's only one Earth in the world. Think about it, Earth is one of the only planets in the vast universe. If we had slid to where we are 50 years ago, it would almost certainly be in outer space. Even the destination Earth is back where it was 50 years ago. In other words, when the time slip succeeds, it is suddenly thrown into space where there is nothing. How is it impossible to go from there to the Earth of the past? ”

Did you really want someone to hear it? It was already spoken with a tongue.

But that didn't seem to be enough. After a short time, Mira replied, "Hmm, I feel that way when you say that," and said, "That's right! That's enough,──” he continued.

Alat is particularly curious about the time-slip because of the maximum mass that can be sent.

If there were no restrictions on mass, size, etc., Alat's theory would collapse. That's because every spaceship that can sail to Earth 50 years ago needs to slip in time.

However, if there are limitations, the theory will add some realism. If it is about a few hundred kilograms, it would be quite difficult to maintain a state of survival in a harsh space while still securing the means to reach the earth.

“If there's a limit, the next thing I know is how to calculate the coordinates of the Earth 50 years ago and take them to each time machine.──”

Alat's story doesn't stop. Rather, things were starting to get better and better.

That's probably because there are many people here who are similar to him or who are close to him. There are few people who would listen purely to debates and controversies.

Therefore, ordinary people such as Mira, who listened to the story as much as possible, were valuable to Alat.

A unique time machine theory developed by Alat like a fish that obtained such water. What happens if I use a time machine in the vicinity of where the Earth was 50 years ago, but this is also quite difficult.

After all, with limited equipment, we had to succeed in entering the atmosphere on our own.

"Hmm, I think you should go out on Earth from the beginning, but can't you do that?"

Mira wonders if she can't make the time-slip destination the surface of the Earth, not the outer space, if she has already come close to the Earth.

With the developed scientific power of the future, I thought that no matter how fast the Earth travels through outer space, it might be possible to predict its orbit perfectly, so I came up with this idea.

From the beginning, even if you can only time-slip naked on the ground, there are no other problems besides ethics.

“That's a good idea! I was waiting for you to say that!”

Alat's reaction to Mira's words was joyful. That seems to be the joy of praising you for saying the ideal thing at the ideal time.

“Well, I'm expecting a serious problem with that.──”

Alat, who tells us that it is the very important laws of physics that exist as the cause, began to speak even more confusingly. The first and most important thing is the law of inertia.

To summarize their contents, this is what happens.

During a tie-slip, there is a high chance that it will appear outside the laws of space physics. If that happens, after the time slip, inertia will return to the current universe with zero inertia.

That's the question of what happens when we get to the surface of the Earth, where we move through space at a tremendous speed.

"Ahh... so much so..."

While feeling a little bit of remorse at Alat, who spoke happily, Mira was convinced that the danger was likely to be sufficient.

Too obvious to forget, but now it feels like nothing is moving because inertia is moving with the planet.

What would happen if it suddenly appeared on the surface with zero state? I can't imagine it, but there is no doubt that it will be miserable.

When Mira realized the possibility, Alat laughed with great satisfaction.

"──Well, I've said a lot, but in the end, it's just a delusion." Maybe there's a suit that can penetrate the atmosphere on its own. If the mass is limited at one time, you can start the time machine many times and send the necessary supplies to the site. Even if there's a time machine cooldown, it doesn't matter if you send it over time. No matter how many years have passed, if you send it to the same place at the same time, there is no time difference in the recipient. But time-slip is an unknown phenomenon. Sometimes distortion occurs due to interference with space-time, and it is not possible to specify the same time and place. That's why I may not be able to answer for the rest of my life. That's why the time machine has to be finished. ”

It was Alat who had already fully told me, but I finished the explanation by saying that all of them were just delusions.

The conclusion is, I don't know at all. However, she seemed to be satisfied that it was── rather interesting.