Mecha Star Wars.

In Lin Fan's view, stars can move freely in space.It should be the fastest and best way to let her confirm the unknown object.

But Zhu Cunjun shook his head, "You don't need to go, it's too dangerous."

After the aviation plane landed, the space management center sent several missions to Xingchen.

Among them are the flight distance test to the apogee, and the orbit of the moon around Lanxing.

During Lin Fan's boring flight, she watched the gray moon gradually grow larger, filling her entire field of vision round and round, and then passed by, gradually moving away behind her...

Because the mission order only allows orbiting but not landing, she can only watch helplessly.

Landing on the moon, if you talk about it, you can brag about your achievements for a lifetime!
She felt itchy, and in the end she just stopped thinking about it.

The space management center is also slowly exploring the ability of stars.

Science has never been achieved overnight. Even if the stars showed obvious advantages, they did not dare to take too big a step in the space without foreign aid.

Bullshit is small, if you lose the stars, it will not be worth the loss.

So each mission is progressing gradually, and if there are no accidents, we should be able to land on the moon next time.

Judging from the current data, the farthest distance that the stars can reach is 40 kilometers, which is also the distance from Lan Xing to the moon.And in the orbit of the earth and the moon, it can move freely without being affected by other external gravitational forces.

But in the photo, the location of the unknown object is in the Kuiper belt outside the orbit of Neptune.

"What is the Kuiper Belt?" The new term touched Lin Fan's blind spot again.

Zhu Cunjun calmly opened the content he had searched and put in his favorites. "It's the asteroid belt. Do you know the eight planets?"

"I know." Lin Fan nodded and replied, "I learned it at the launch center before. According to the distance from the sun, they are Mercury, Venus, Orchid, Mars, Jupiter, Saturn, Uranus, and Neptune. Because the moon revolves around Orchid, Therefore, the satellites belonging to Lanxing form a unique earth-moon system."

"Yes." Zhu Cunjun looked at her with a smile, "Then you should also know that there is an asteroid belt between the orbits of Mars and Jupiter."

"Yes." Lin Fan continued, "Affected by the gravity of the sun and Jupiter, there are almost 50 asteroids gathered in this area, which belongs to the most dense area of ​​asteroids and is also the main belt asteroid."

Asteroids are celestial bodies that revolve around the sun, but are much smaller in volume and mass than planets, and are the most numerous stars in the solar system.

There are generally several theories about the formation of asteroids, among which the theory that "asteroids evolved from asteroids during the formation of the solar system" is the most mainstream.

There are already many in the asteroid belt, but they are still growing every year.

To put it simply, asteroids are all small celestial bodies in the solar system that are not comets and revolve around the sun, with a diameter within 1 meter to 1000 meters.

And comets, also known as broom stars in legend, are also stars that revolve around the sun.

Its volume and mass are very small, but it will undergo different external shape changes depending on the distance from the sun.

When it's far from the Sun, it's a dirty puck of ice and dust.

But once it is close to the sun, under the action of solar radiation, the material of the comet changes, decomposing the comet head and tail.

So comets are very easy to distinguish. When you look up at the starry sky, there is a broom-like celestial body with a tail in the sky that is a comet.

Then someone will ask again, isn't that a shooting star?
of course not.

Meteors refer to meteoroids running in space, that is, cosmic dust or solid blocks are attracted by the gravity of Lanxing when they are close to Lanxing.

Most of the visible meteors are about the size of a grain of sand and will burn up before they hit the ground. A small number of meteors that fall on the ground can remain, that is, meteorites.

And from the internal structure, the meteor contains more iron, nickel, sulfur, silicon and other minerals that are originally on the blue star.

Therefore, meteorites are generally also called meteorites. In ancient times, they were even used to make swords.

The internal substances of comets are mainly water, methane, cyanide, nitrogen, carbon dioxide, etc., so when certain conditions are reached, they will condense into ice.

to conclude.

Comets are sun-circling objects whose shape and brightness are affected by their distance from the sun.

The meteor is a light effect produced by the friction and combustion of meteoroids after entering the atmosphere.And because the internal substances are different, the color and shape of the burning are not fixed.

The book follows the text.

Seeing Lin Fan's eloquent talk, Zhu Cunjun couldn't help sighing in his heart—the young man's brain is so good, he continued to switch web pages with the mouse quietly.

"That's right," he appreciated, "Now that you know the asteroid belt, it's easier to understand the Kuiper belt. It's a disk-shaped area with dense celestial bodies near the ecliptic plane outside the orbit of Neptune. You can think of it as An enlarged version of the asteroid belt."

The ecliptic plane refers to the orbital plane of Lan Xing around the sun.

When Lanxing is revolving, the sphere is inclined to a certain extent.Therefore, the equatorial plane and the ecliptic plane form an angle of about 23 degrees.

Although this angle is not big, it is not small when it is extended in the vast space.

The asteroid celestial bodies in the Kuiper belt are basically distributed in this angled area, forming a three-dimensional ring similar to a donut.

According to scientific estimates, the width of the Kuiper belt is about 20 times that of Jupiter's asteroid belt, and its weight is 20 to 200 times.

Just by looking at the numbers, one can imagine that there are countless celestial bodies in it.

Lin Fan's eyes widened, "Isn't that densely packed with a large asteroid?"

"Yes, because it is on the edge of the solar system, there is a saying that the Kuiper belt is the protective belt of the solar system, but there is also a saying that the Kuiper belt is an obstacle to outward exploration."

"Both theories reflect the barrier function of the Kuiper belt." Lin Fan quickly reacted, "Is it because there are too many asteroids? It makes it difficult for stars or other things in the outer solar system to enter the solar system?"

Zhu Cunjun nodded, "The Kuiper belt itself has orbital resonance, and the gravity of Neptune makes these orbits unstable. Some stars will be sent into the solar system, and some will be dispersed and sent out, thus forming many stars in the Kuiper belt. Unstable white space."

"Because of different gravitational forces, different orbital regions, different sizes of celestial bodies and different ethnic groups... Various factors affect the resonance frequency inside the Kuiper belt. I don't really understand the specific principles. Anyway, the final result is that it forms a A natural barrier between the inner and outer solar systems."

After all, Zhu Cunjun is not engaged in celestial body research, and it is already good to be able to understand all these things.

"But you said the unknown object is in the Kuiper belt?" Lin Fan didn't understand again, "Since it's a barrier, then..."

"Assuming it's really something like a spaceship, it's not surprising that it can pass safely in the Kuiper belt." Zhu Cunjun picked up his teacup and took a sip of water. Embarrassing. Didn’t it mean that Nuwa came and left in a spaceship 5 years ago?”

That's right, Lin Fan forgot about this.

The shuttle is still buried in the ground, since it can come in, there must be their way.

"Also, this is not the first time." Zhu Cunjun said, "A few years ago, country P once discovered objects that looked like spaceships in the Kuiper belt."

First of all, I wish the students who take the college entrance examination today, they will be able to rely on everything, they will be right, and they can enter their ideal colleges and universities.

I did a serious research on the science popularization today, but I didn’t expect to learn astronomy at this age.

After all, we are going to go to space later, these stars and so on, there must be a concept, right?

There are too many nouns for fear that people may not understand them, so I explain them in the text.You can't expect everyone to read a novel and go to Baidu, can you?
It would be best if everyone could understand the content of the novel, and it would be even better if it could add some extra knowledge.

Haha, this is science fiction.Although only a little bit.

Hehe hehe