Chapter 190

When the third was scaring the children, the eldest was holding a small red flag in his hand.

"Cough! Good evening, gentlemen. We are responsible for picking you up and seeing you off this time. Please keep order when you get on the ship and line up to follow my little red flag. If the flag doesn't fall, don't run around. I'll be deducted if I lose one! Thank you for your cooperation..."

The familiar guide's opening remarks made everyone smoke at the corners of their mouths. Look at the people present. In addition to seven or eight hands and feet, they can move by themselves. The rest are either in a wheelchair or lying on a stretcher. You should run and let me have a look!

"Hey! Lao Liang, these two people who came to pick us up don't look very reliable... What kind of SOS organization is really no problem?" an old man with gray hair and wrinkled face said to the old man with rosacea sitting in a wheelchair.

"Lao Yu has confirmed it. There should be no problem! Besides, what can people figure on us, our old bones that are about to enter the earth? Maybe people don't like the skills in our minds."

Before setting out, these scientists were informed of some intelligence of Captain ghost and SOS organization in advance. No one can say a word about captain ghost's black technology. The painting style is much different from that of this era!

"Well, I'll see you later. You can see whether it's true or false..."

"Oh! Come!" just then, the boss suddenly turned his head.

"Hua Hua ~" in the moonlight, it was like a Silver Whale slowly emerging from the water, and everyone slowly opened their eyes

……

Earth secret base.

"Lagrange point?!" Nie Yun looked at the excited Yu in front of him and wondered.

Information about Lagrangian points immediately came to his mind.

Lagrangian point refers to some special positions in space. At this position, the gravitational force and centrifugal force of the two celestial bodies balance at this point, so that the third object remains relatively stationary with the first two objects.

For example, if a satellite is placed on the Lagrangian point of the solar terrestrial system, it can remain relatively stationary with the sun and the earth and can stably observe them.

This characteristic of Lagrange point makes it have considerable strategic value in the space age!

Because it can maintain orbit stability without consuming fuel or very little fuel. In the space age, with low operation cost, it has the best conditions to become a transportation hub!

Just like Shanghai's natural strategic position, it is destined to become an important transportation hub in Global trade!

"I didn't think about it before. Indeed, this feature is really suitable for placing monitors!"

Although Nie Yun has a large amount of astronomical data in his mind, he is not a professional astronomer after all. There is still a blind spot in his thinking!

In his mind, he immediately began to rapidly analyze the possibility that the alien detector existed at the Lagrange point

There are five Lagrange points around large objects such as planets or stars. Taking the solar terrestrial system as an example, the five Lagrange points are L1 ~ L5 respectively.

L1 ~ L3 are on the connecting line between the two celestial bodies.

The first Lagrangian point L1 is located between the earth and the sun, about a million miles from the earth.

Observing the sun on L1 can be free from gravitational interference. This point has now been occupied by human "solar and solar wind layer detector" (SoHo) and "deep space meteorological satellite".

L2 is also about 1 million miles away from the earth, but unlike L1, it is not between the sun and the earth, but on the extension line of the sun and the earth.

The spacecraft in this position can clearly observe Mars and even the whole deep space because the sun, earth and moon are behind it.

At present, NASA's Wilkinson Microwave Anisotropy probe (WMAP) is at L2 to measure the residual thermal radiation after the big bang.

These two Lagrange points have been occupied by the above-mentioned probes from Europa and NASA, and these probes are very close to the earth. They have been renamed Nie in the "solar system investigation network" program not long ago. It is unlikely that alien probes can engage in espionage under Nie Yun's eyes, which can be basically ruled out.

The third Lagrange point L3 is located on the earth sun extension line opposite to the earth. It is separated from the earth by the sun. If the detector is in L3, the difficulty of penetrating stars to detect the earth may have broken through the sky and can be basically ruled out.

Then, there are only L4 and L5 points left!

They are located on both sides of the earth and are the two intersections of the vertical bisector of the sun earth line and the earth orbit.

These two points are one of Nie Yun's current detection blind spots!

"Hmm! Considering the celestial kinematics, this is the best possible position for the detector! I prefer L4 and L5!" Yu Lao said a judgment similar to Nie Yun.

"Well... But considering that the other party's technology may be far superior to the earth, we don't rule out the possibility of other locations

In order to be very hidden, it is likely to be a passive detector. For the fixed target of the earth, the amount of passive detection is actually enough!

It is also likely to have done shape camouflage, or even optical camouflage!

In addition, since it cannot be discovered by the existing detection technology on earth, the other party's communication means should not be traditional radio technology, perhaps laser communication with extremely difficult detection and excellent confidentiality, or higher-level quantum communication, or even communication means beyond my understanding... "

Yu Lao observed Nie Yun's expression as he spoke.

He just used the "other party" many times in his words, but Nie Yun didn't express anything about it. Obviously, he tacitly accepted the existence of the "other party", and couldn't help being more confident about his previous judgment.

Sure enough, I didn't find the location of the detector for myself! The boss's opponent... Suddenly so excited

Nie Yun can't find Yu Lao's careful thinking, but he should let them know sooner or later. He doesn't tell them directly because even he himself knows very little about these B stars, and even whether the detector exists or not is a problem.

If you make an own dragon at that time, you will lose face as a boss, okay!

Can you say: "Oh, I made a mistake. I scared myself. It's so embarrassing..."

In that case, the SOS organization on the tall will fall to the end, okay!

"Well, you've done a good job. I'll send detectors to inspect these two locations. No matter what the result is, as a reward, all the detection data of the sea wolf will be open to you!" Nie Yun smiled.

Yu Lao was excited at the moment. This kind of space observation data is the most precious thing for astrophysicists like him!

However, he will soon find that the sea wolf's detection data are not only in earth orbit

"By the way, your colleagues are almost here. As their leader and old acquaintance, go and say hello to them before that, which can also make them feel at ease.

In addition, I will arrange gene countercurrent surgery as soon as possible, and you are also ready. "Nie Yun took a meaningful look at Yu Lao.

"Hey, hey! Boss, don't worry, leave it to me!" Yu smiled