"Wandering celestials?" Yang Peiqi was stunned for a moment and asked, "Is it a wandering planet?" ”

For wandering planets, Yang Peiqi knows something. A wandering planet is a planet that does not orbit any star. Because he does not orbit any star, he is also called an interstellar planet or an orphan planet. Unlike planets like Earth, which revolve around the sun, they wander around the universe like homeless children.

Although it does not orbit around any star, it has a planetary mass. They are either ejected from the planetary system that originally orbited due to the gravitational pull of other planets and other celestial bodies, or they were ejected from the protoplanets during the formation of the planetary system, and thus wandered in galaxies or the universe.

However, it is very difficult to detect the presence of such planets, because the microwaves emitted by them are extremely weak relative to the cosmic background radiation. It was only last year that scientists used gravity microlensing to confirm the existence of interstellar planets for the first time, and speculated that there are twice as many interstellar planets in the Milky Way as Jupiter-sized stars.

"It's not just a wandering planet." Explorer 8 said, "Wandering objects are a large group of objects, and wandering planets are just a small type of them. ”

Explorer No. 8 told Yang Peiqi that there are many wandering celestial bodies in the universe, and even if they are stars, there are also wandering in the universe. Even, just off the corner of the solar system, there is a wandering star. It is precisely because of the existence of this wandering star that most of the planets in the solar system revolve around the sun at an inclined angle, and the rotation of these stars is elliptical.

"Because wandering celestial bodies do not have a fixed orbit in the universe, but are running around the universe, so. Such a star may pass through some high-grade galaxies on its way and carry high-grade matter with them. Then come to some very low-level galaxies. In this way, it will be guided into some low-level galaxies. Occurrence of high-grade substances. Explorer 8 finally said to Yang Peiqi.

After listening to Explorer 8's explanation, Yang Peiqi agreed that there might really be some high-grade matter on such a celestial body. Moreover, in a low-level galaxy such as the solar system, only such a special star can contain high-grade matter.

"Then do you think it is more likely that there is a zài high-grade substance on the wandering stars in the solar system?" Yang Peiqi asked.

"It's hard to say." Explorer 8 said, "Even if there is a wandering celestial body like zài, I don't think the level of matter on it is too high. ”

Yang Peiqi asked puzzledly, "Didn't you just say that there may be high-grade substances on this celestial body?" Why is it said that it is unlikely that there will be substances of a very high level? ”

Explorer 8 said: "Because the Milky Way itself is not a very high-level galaxy. Although I haven't fully explored the Milky Way, this galaxy is at the highest level, which is intermediate to medium. ”

After getting Explorer 8 for so long, Yang Peiqi also has a general understanding of this guy's classification of substances. According to Explorer VIII's regulations. The ninth, eighth, and seventh grades of matter are classified as primary matter, with ninth grade matter being primary and primary, eighth grade matter being elementary and middle, and seventh grade matter reaching primary and advanced level. By analogy, the sixth, fifth, and fourth-level substances above correspond to intermediate, intermediate, intermediate, and advanced high, respectively.

Explorer 8 said that the Milky Way is just an intermediate-level and medium-sized galaxy, which means that the matter stored in the Milky Way data is basically the fifth-level matter. ……

When Explorer 8 explained the wandering star to Yang Peiqi, Yang Peiqi learned that even a lonely traveler in this kind of universe is under normal circumstances. That is, if you travel in a large galaxy, it is impossible to jump out of a large galaxy. The Milky Way is a large galaxy, and it is it and billions of extragalactic galaxies that make up this universe. If we look at the universe we live in as a whole, then these large galaxies are like a country. And the stars are people from various countries. Each country has its own laws. It also has its own scope of sovereignty, and it is not so easy to go to other "countries". Even if it is a "wandering child" like a wandering celestial body.

Explorer 8 said: "Because the Milky Way itself is not a very high-level galaxy. Although I haven't fully explored the Milky Way, this galaxy is at the highest level, which is intermediate to medium. "Actually. Even if these wandering objects were able to "smuggle" to other countries (large galaxies), it is unlikely that they would carry too much high-grade matter. Because the level of this universe is originally very low, it is only a primary universe. In the primary universe, the highest amount of matter that appears is the fourth-order matter. If there is a substance of the third level and above, it is already out of the hat of the primary universe.

After getting Explorer 8 for so long, Yang Peiqi also has a general understanding of this guy's classification of substances. According to Explorer 8's regulations, the ninth, eighth, and seventh grades of matter are classified as primary matter, with the ninth grade being the primary substance, the eighth grade being the primary medium, and the seventh grade being the primary and advanced substance. By analogy, the sixth, fifth, and fourth-level substances above correspond to intermediate, intermediate, intermediate, and advanced high, respectively.

Explorer 8 said that the Milky Way is just an intermediate-level and medium-sized galaxy, which means that the matter stored in the Milky Way data is basically the fifth-level matter.

When Explorer 8 explained the wandering star to Yang Peiqi, Yang Peiqi learned that even a lonely traveler in this kind of universe, under normal circumstances, is traveling in a large galaxy, and it is unlikely that he wants to jump out of the big galaxy. The Milky Way is a large galaxy, and it is it and billions of extragalactic galaxies that make up this universe. If we look at the universe we live in as a whole, then these large galaxies are like a country. And the stars are people from various countries. Each country has its own laws and its own scope of sovereignty, and it is not so easy to go to other "countries", even if it is a "wandering child" such as a wandering celestial body.

In fact, even if these wandering objects were able to "smuggle" to other countries (large galaxies), it was unlikely that they would bring too much high-grade matter, because the level of this universe was already very low, and it was only a primary universe. In the primary universe, the highest amount of matter that appears is the fourth-order matter. If there is a substance of the third level and above, it is already out of the hat of the primary universe. (To be continued......)