Sirius is a minus magnitude star in the constellation Canis Major, located about 8.6 light-years from the Solar System. The name of the pen & fun & pavilion www.biquge.info is Alpha Canis Major according to the Bayle star nomenclature.

In ancient Chinese culture, it belonged to the Sirius official of the Twenty-Eight Nakshatras. Su Dongpo once had a word cloud: he will hold the bow like a full moon, look northwest, and shoot the wolf. It refers to the star Alpha Canis Major, which is Sirius.

Sirius was called "Thorpdet" by the ancient Egyptians in the earliest astronomical records. During the Middle Kingdom of Ancient Egypt, the Egyptian calendar began with the "rising of the sun" of Sirius. That morning, Sirius, far enough away from the Sun, was able to rise earlier than the Sun, avoiding the glare and reappearing in the sky after 70 days of vanishing. The importance of this day in the calendar is due to the fact that it is also shortly before the Nile cycle flooding and the summer solstice. The 70 days that Sirius disappeared from the sky symbolized in Egyptian mythology the days when Thorpradite and Isis (a goddess in ancient Egyptian religion) spent time in Egypt.

Sirius is also a binary star system. If we look up at the stars in the winter night sky, the brightest star in the canopy is one of the stars of Sirius (Sirius, South River, and Betelgeuse, which, for those who live in the Northern Hemisphere, together form the three vertices of the Great Triangle in the winter night sky).

Sirius A, the brightest star of the day (with the highest apparent magnitude), is a blue dwarf star belonging to the main sequence. Sirius A is a star with a mass of about 2.1 times that of the Sun, 23 times brighter than the Sun, a slightly larger volume than the Sun, a radius of 1.8 times that of the Sun, and a surface temperature of 2 times that of the Sun, up to 10,000 C.

Sirius B, the first white dwarf to be discovered, is one of the most massive white dwarfs known. Today it has almost the same mass as the Sun, yet so much matter has been compressed to about the size of the Earth (with an average density of 30 kg/cubic centimeter). It is estimated that in about 200 million years, Sirius B will gradually and completely cool down.

......

The [Space Tunnel] constructed by the Dark Energy Civilization is located halfway between Sirius and the solar system. The sprawling Space City group of the interstellar migration camp is expected to take another 9 years to reach the designated coordinates.

In this long journey of interstellar wandering, Hara Haochen, like other scientists, spends most of his time on scientific research, and his strong desire for knowledge will make people forget boredom and forget loneliness. So, it couldn't be better.

It's just that occasionally looking at the bright starry sky, as well as the eternal, boundless, dark and distant cosmic space, Yuan Haochen will also inexplicably disturb his mind.

"Is it true that every cosmic civilization will inevitably experience a wandering, but the time when the wandering occurs sooner or later, and the reasons for the wandering are different."

Some people believe that the wandering civilization is a form of transition from a low-level civilization to a high-level civilization, or a necessary way to develop. It's like the creator civilization, which has also experienced wandering and migration, and finally left the galaxy and reached an infinitely distant place.

"What is the final fate of every cosmic civilization? Endless expansion, or one day of destruction! As the saying goes, the beginning will eventually come to an end, and perhaps the development of every civilization is nothing more than a process of struggle before the end......"

Yuan Haochen knows very well that there is no end to the understanding of the universe, and the tiny earth civilization is still circling around the solar system within 5~6 light years to this day, and I really don't know when and what month it will be able to uncover the ultimate mystery of the universe.

"Commander-in-chief, the central detection system has sent a report that a wandering planet has been found in the area of about 500 astronomical units in front of the right side of the Space City Group!"

A crisp voice interrupted Yuan Haochen's reflection on the philosophy of the universe, and then the work assistant reported to him.

"Wandering planet, is there any problem, has anyone found the relics left by the civilization of the unknown universe on it!?"

The discovery of a wandering planet in this area, although Yuan Haochen was a little surprised, was still within a reasonable range. This has not happened for the past 20 years. In the past, when you encounter such a guy, you will be regarded as a treasure by various deep space resource development fleets.

"Not really, it's a torn big guy! It looks like someone has taken a big bite of the fruit. The assistant made a vivid analogy to the wandering planet.

"That sounds a bit interesting, you make arrangements right away, I want to go and see it on the ground!" Yuan Haochen commanded.

"Yes, Commander-in-Chief!" The assistant quickly turned and left.

......

A few days later, a silver-gray command ship approached the wandering planet, a lonely wandering planet in the deep space of the universe.

It's a rocky planet, about the size of Mercury, but much denser. The entire planet is dark gray, and the atmosphere is negligibly thin. The most striking thing is that there is a noticeable "gap" around its equator, which has not yet fully recovered, and this "gap" occupies about one-fifth of the entire planet.

"It's like a bitten fruit!"

In the command ship, Yuan Haochen looked at the big guy not far away (relatively speaking) and said.

"Someone must have taken a bite out of it." The director of the Institute of Astrophysics, who came with him, speculated, "Could it be that this wandering planet was wandering too close to a black hole or other massive object, and although it was not eventually captured, it was bitten down by a piece of material?" ”

"It's also possible that it was torn apart in the course of a multi-star system gravitational war." Yuan added, "Sirius is a binary star system, maybe this guy was torn apart by Sirius A and B a long time ago and then kicked out. Perhaps it is not a wandering planet, but just orbiting a binary star system in an extremely distant orbit. ”

Wandering planets are planets that do not orbit any star. 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.

In fact, in the Milky Way, the number of wandering planets the size of Jupiter is twice as large as that of stars, that is, 2000~400 billion. The mainstream scientific community believes that these wandering planets formed around stars and were later "kicked" out of the planetary system and scattered into space due to some mechanism.

As for the part of the wandering planet that was bitten off in front of you, it may have been caused by the gravitational war in the multistar system, or it could have lost a piece of flesh in the process of escaping some massive celestial body.

In the history of human astronomy, it has been observed that a supermassive black hole in the constellation Ursa Major, where the Big Dipper is located, tore off a large piece of material from a star that escaped.

In fact, telescopes can't see the star itself, let alone a planet. Astronomers did, however, see flashes of light from the black hole as it "bites" off a piece of material as it tries to capture it.

Events like this are known in astronomy as "tidal disintegration events". (To be continued.) )