Sci-fi fans: They also know that planets orbit the sun, that Saturn has rings, and that Jupiter has four major moons. They have four calendars, based on the Sun, Moon, Sirius, and Venus. According to the Tagans, their knowledge of astronomy was imparted to Earth in ancient times by intelligent beings from the Sirius system. They called this creature "Nomu".

Sci-fi fans: In the legends of the Tagan people. The "Nomu" landed on Earth from somewhere northeast of the current homeland of the Tagang people. The aircraft they were flying in circled and descended, making a loud noise and a gale that made deep marks in the ground as they landed. The appearance of "Nomu" is like a fish and a human. is an amphibian and must live in water. In the drawings and dances of the Tagan people, legends about "Nomu" are preserved.

Sci-fi fans: The Tagans still have a painting clearly depicting their "gods" descending from the sky and landing on their clan in a large ship with flames in tow. It was then speculated that the "Nomu" might be an alien who had come to Earth from Sirius (or its related planet).

Science fiction fans: Astronomers first detected the existence of Sirius in 1844, and with the help of various modern astronomical instruments such as high-powered telescopes, it was recognized in 1928 that it was a very small and extremely dense white dwarf. It was not until 1970 that the first photograph of the star was taken was taken.

Science fiction fan: The Dogans living in the caves of Filipino obviously don't have such high-tech astronomical observation instruments, so how did they get their knowledge about the star? Not only that, but the Togans also accurately drew the elliptical trajectory of Sirius around Sirius on the sand, which is very similar to the accurate mapping of astronomy.

Sci-fi fans: The people of Dogan say that Sirius has an orbital period of 50 years (the actual correct number is 50.04+/-0.9 years) and that it rotates around its axis of rotation (which is also true). They also say that Sirius people are blue-blooded, their blood is blue, and they do not live in Sirius A and Sirius B, but in the third star of the Sirius system, called Enmea, and that there is a moon "Osiria Convia" orbiting "Enmea". However, until now, astronomers have not discovered "Enmea".

Sci-fi fan: But there are always two sides to things, and not discovering "Enmia" now does not mean that "Enmia" did not exist before. Why did the Sirians come to Earth? Didn't they know that their homeland, the planet Enmea, was about to be destroyed?

Science fiction fan: My answer is: Yes! It's right next to us! The sun! Have you ever seen that very popular movie? It's called "The Wandering Blue Earth". The general plot is that our sun is getting old and about to burn out, it is turning red, and it is getting bigger and bigger, and it doesn't take long for it to expand to engulf the earth. Yes, the Sun at this time is no longer the yellow dwarf we are now, it has aged into a red giant......! I won't spoil it, so if you haven't seen it, go see it yourself. It's not humans themselves who fled the planet anyway. And the Sirians are not, they really have fled their planet.

Sci-fi fans: No one argues with me that Sirius is not a red giant?

Don't worry, I'm typing, I'm going to have to retype it now......

Lewd desires: You dig a pit and want me to jump in? I'm not that stupid.

Sci-fi fans: Sirius, also known as α Canis Major, is located about 8.6 light-years from the solar system and is the brightest star in the whole day except the Sun. When we talk about Sirius, we mean Sirius A, because it is a blue dwarf 23 times brighter than the Sun, slightly larger than the Sun, and much warmer than the Sun.

Science fiction fans: Sirius B is a white dwarf star, with a mass greater than the sun, but the size is only the size of the earth, you must know that the volume of our sun is 1.3 million times larger than the earth! But here's the twist!

Science fiction fans: in ancient Babylonian writing (cuneiform script created by the ancient Sumerians in 3000-3400 B.C., used until A.D.), Sirius is copper-colored, Horaz calls it the Red Dog, Seneca calls it even redder than Mars, and scholars such as Atas and Ptolemy, who recorded Sirius in the ancient books of Gullzhou 2,000 years ago are all red!

Sci-fi fans: Can Sirius turn red? Absolutely? Remember Sirius B is a small, heavy white dwarf? It was a big, red red giant, and the white dwarf is the inner core of the red giant that is left after it has exploded or been stripped of its mass. Sirius B in the red giant state is very large, larger than Sirius A, and it overshadows the light of Sirius A, so from our Earth, Sirius glows red.

Science fiction fans: But in our ancient books since 2000, it is recorded that Sirius is white, and in just a few hundred years or even decades, can a red giant star become a white dwarf? The answer is yes! Is it a red giant that explodes into a white dwarf? No, it will form a planetary nebula, and this process will last for millions of years, and if it does erupt, it can be observed now. But no planetary nebulae have been observed near Sirius, so it is clear that it is not a red giant explosion.

Sci-fi fan: That can only be another possibility, the red giant star has been stripped of its outer mass, leaving the white dwarf inner core. A very small black hole can strip away all the outer matter of the red giant star Sirius B, but it can't absorb the supermassive core, leaving Sirius B in the state of a white dwarf in the universe.

Sci-fi fans: Here's my bold guess: The Sirians live in the ocean of the planet "Enmia" in the Sirius system, have been haunted by the red giant Sirius B for hundreds of thousands of years, and when it is about to threaten the safety of the planet "Enmeya", the Siriusians, who have developed the technology of high-speed interstellar travel, are ready to abandon the planet "Enmeya" and migrate to a nearby galaxy.

Sci-fi fans: Some of them chose Earth, others other planets. In the end, some of the people left were desperate on the planet "Enmea" or its moon "Osiria Convia" An ultra-small black hole was created nearby, which directly destroyed the two planets and absorbed and stripped all the peripheral materials of Sirius B, leaving only the core of the super-massive white dwarf, and finally the ultra-small black hole could not absorb the mass of the white dwarf, and there was no matter nearby to absorb, and after Hawking radiation (a phenomenon that the thermal radiation emitted by the black hole will reduce the mass of the black hole itself and cause the black hole to evaporate) became smaller and smaller, and finally disappeared completely.