Wittman projected the photographs taken by the astronomical telescope into the lobby of the Mars Command through holographic projections.

"Boss, you see this is the previous photo, the highlight of this location is the white spot that we have been paying attention to. This latter photo is the most recent one taken, and you look at the same location. ”

Du Qiu listened to Wittman's narration, looked at the comparison of the two photos in front of him, and his heart gradually sank.

In the latest photo, the location of the original white spot is a larger bright spot, which is more than three times magnified compared to before.

"Professor, does this mean that some of the enemy's fleet may have not started their engines before?"

Wittman replied, "It's possible. ”

"Can't be sure?" Du Qiu asked rhetorically.

"The main thing is that this white spot has not moved until now, and I can't be sure that this is the tail flame of the space fleet."

Du Qiu frowned and said, "But in the middle of the two star systems, it is completely a dark void, and it is impossible for any reflective matter to appear. ”

"If it weren't for the appearance of the meteorite battleship, I wouldn't actually be able to use this completely immobile white spot as the tail flame of the space fleet." Professor Wittmann voiced his doubts.

Du Qiu thought for a moment and said, "Have you observed the surrounding situation of the white spot, is it possible that the other party has a similar invisible warship." ”

"It can't be ruled out that they will accelerate with a tail flame at the white spot, and then they will go into inertial navigation and turn on the stealth system, then we will indeed lose their tracks," Wittmann said.

But as I said, this white patch has almost never moved at all......"

"That's not right." Du Qiu interrupted, "Professor, the white spots are now more than three times larger than before, and according to calculations, such a large white spot means that it actually covers at least tens of millions of kilometers.

Does this mean that the enemy's warship has accelerated tens of millions of kilometers and then turned off its engines and entered a state of inertial flight? ”

Du Qiu is not a novice in astronomy before, let alone a novice in interstellar warfare, after this period of continuous learning from the ship's previous combat examples, and at the same time constantly simulating invasion wars, he has a certain grasp of this upcoming counterattack.

Weitman was stunned for more than ten seconds, "Boss, what you said is very reasonable, but if the enemy fleet only accelerates a distance of tens of millions of kilometers, I am afraid that it will take more time to reach the solar system with the speed obtained." ”

Du Qiu became excited and said, "That's right, so now your task is to calculate the speed they reach after accelerating through tens of millions of kilometers according to 5,000 kilometers per second."

Within a certain area, focus on monitoring and observing to see when new white spots will appear, which can be regarded as finding the enemy's tracks. ”

"The boss's idea is very good, I will start arranging people to monitor the division, and never let the enemy fleet escape from our sight."

Du Qiu ended the call with Weitman, and he faintly felt that something was wrong.

Just thinking about it, I didn't think of anything.

Still, Du Qiu made a cautious move, arranging Stardust to increase the production and deployment of the probe.

He wants to spread these tentacles that can be used for battlefield situation monitoring and perception throughout the solar system, and if he has time, even extend to several major directions outside the solar system.

After arranging this event, Du Qiu began to devote himself to the development, production and deployment of new weapons, which can be called the killer weapon of magical technology.

It is also where Du Qiu's confidence lies in the face of the invading fleet.

Time flies, and three months have passed in the blink of an eye.

Throughout the solar system, various probes are increasingly being deployed to monitor every void in the solar system.

Not only that, but some of the probes have already extended beyond the solar system.

It is also for this reason that the Celestial spacecraft, which have already entered the safe escape zone in interstellar space outside the Kuiper Belt, can still maintain communication with the Martian base.

The celestial spacecraft flies directly outward at an angle to the ecliptic plane of the solar system, and such a space flight is completely unable to rely on the gravitational pull of the planets of the solar system.

This kind of flight requires a huge energy guarantee to do so, and with the metallic hydrogen energy carried by the Celestial spacecraft, the endurance is about 200 years.

In other words, the energy carried by the Celestial Ship is not capable of flying to nearby star systems.

Therefore, the Celestial Spacecraft needs to continuously collect hydrogen from the void before leaving the Oort Cloud range.

After all, in real interstellar interstellar space, there is not as much hydrogen as in the Oort cloud.

However, Du Qiu has already handed over the latest nuclear fusion engine system technology to the research institute, and in the past three months, the Celestial Spacecraft has completed the corresponding production, and at this moment the Celestial Spacecraft is preparing to replace the main engine module.

With this new type of nuclear fusion engine, using the method of non-working fluid radiation energy, and obtaining a powerful propulsion speed, the speed of the Celestial Spacecraft will increase from the original 3,000 kilometers per second to 8,000 kilometers per second.

Taking this opportunity, Ning Shuangshuang was on a holographic video call with Du Qiu.

"You're saying that no trace of the invading enemy has been found until now?" Ning Shuangshuang couldn't hide the shock in his heart.

Du Qiu nodded, "Yes, as if they never existed." At present, our ability to detect extrasolar systems is still very insufficient, and we can only monitor a few key directions.

However, in the past three months, nothing has been found in these key directions. The white patch, after a sudden increase in size two months ago, did not take long to return to its original state.

My inference is that the enemy made a sortie from there, and after accelerating, turned off the engine and went into inertial flight. ”

"Won't we be able to detect space warships in inertial flight in the interstellar void?" Ning Shuangshuang asked.

"This is still a little difficult, if it is a massive object, our gravitational wave detector can detect some anomalies, but the space fleet is not a massive object, and our gravitational wave detector is not so sensitive at present."

Du Qiu also had a headache, the quantum radar imitated by the dream alien civilization, I don't know if it is the reason why some material parameters are not up to standard, the detection distance is not up to the level of similar equipment on the main ship of the dream alien civilization.

Dream of equipment on the capital ship of an alien civilization, whose detection range reaches an astonishing 5 light years.

At present, Du Qiu's imitation only reaches 10 astronomical units, which is still equipped on battleships.

The detection range of the Pterodactyl fighter is only 2 astronomical units.

Therefore, although the Pterodactyl fighter patrol formation sent by Du Qiu had reached a position as far as 300 astronomical units away from the Blue Star, it was still far away from the White Spot.

Of course, there is another possibility, the other party is in a state of faster-than-light flight, that is, in a moving curvature bubble, which magical technology cannot detect.

It's just that, if that's the case, they should have reached the solar system and should get out of this state, after all, Du Qiu knows that the fleet in the initial state of superluminal flight cannot fly faster than light in the star system.

However, around the solar system, the exploration network has not found anything at all.

"Du Qiu, could it be that we are completely wrong, the meteorite battleship did not come from that white spot, but may come from a more distant place."

Ning Shuangshuang hesitated, and finally said a thought in his heart.

A fleet ready to invade the solar system, staying 3 light-years outside the solar system, waiting for the meteorite warship to reconnoiter the solar system.

And then what will they do when they find out that they have lost contact with the meteorite battleship?

Listening to Ning Shuangshuang's words, Du Qiu thought about it, and his mind quickly lived the simulation process of this war in the ship's simulation environment.

Ning Shuangshuang reminded him right, he had always been preconceived at first, the invasion fleet was in the white spot, what if the invasion fleet was in other directions?

Previously, magical technology could not do the all-round detection and monitoring of the solar system, and even if there were traces of the invasion fleet sailing in a certain direction, it would be difficult to capture them.

If it weren't for the fact that the Oumuamua meteorite was too man-made, he would not have ordered the Pterodactyl fighter to be sent to capture it.

At the same time, Wittmann and the others will not probe the direction in which the Oumuamua meteorite departed, so as to find anomalous white spots.

However, his side did not detect the direction of the Oumuamua meteorite, so what if the enemy had split up in two ways at the beginning?

When he thought so, Du Qiu's cold sweat came down.