Did the solar system ever have two suns?

  ”Hou Yi shoots the sun” is a well-known myth among Chinese people: in ancient times, there were 10 suns in the sky scorching the earth. In order to save mankind, Hou Yi shot down 9 suns and left one. In reality there is only one sun. However, recent astronomical research has pulled people’s minds back to billions of years ago, making people start to speculate that maybe there really was another sun in our solar system.
  Everything can start with Pluto being “expelled”. The astronomical common sense of our generation has gone through a transformation of the solar system from “nine planets” to “eight planets”. Pluto was downgraded to a dwarf planet at the International Astronomical Union Congress because of the discovery of Eris, a dwarf planet larger than Pluto. The question is, Pluto is not the ninth planet in the solar system, does that mean there are only eight planets in the solar system? Not really. Astronomers have never given up on finding the real “Planet Nine,” which they believe lurks on the edge of the solar system and could be ten times as massive as Earth. The reason why astronomers are so sure of the existence of the real “Ninth Planet” is that a group of celestial bodies that are hovering outside Pluto have been observed, and their orbits are outside the gravitational range of Uranus and Neptune – then, it must be There is a large celestial body that we have not yet discovered affecting them, and this is the real “planet nine”.
  However, the biggest contradiction is coming. At such a distance from the sun, how did the gravity of the sun create such a large planet? Regarding this issue, there are currently various conjectures in the astronomical community. One of the most subversive common sense is that at the beginning of the birth of the solar system, it was actually a binary star system, and the ninth planet was actually formed under the gravitational action of the second sun.
  There are countless stars in the universe. When they are pulled by each other’s gravitational pull and orbit each other, they form a star system, that is, a star system. Astronomers have found through observations that most of the star systems in the universe are binary star systems or even triple star systems, that is to say, in a star system, there are generally two or three stars. The solar system is naturally a star system, but it is strange that there is only one star in the solar system, the sun, and such a single star system is very rare.

  ”The Astrophysical Journal Letters” has published an article in which the famous Harvard astronomers Abraham Loeb and Amir Shiraghi proposed: There may have been a companion star of the sun at the edge of the solar system, and this region may have There are also many undiscovered dwarf planets hidden. They said: “The vast majority of sun-like stars (stars that are very similar to the sun) are members of binary star systems at the beginning of their formation.” According to this theory, the sun once had a companion star of similar mass in its formation stage, but Why can’t I see this companion star now? “It is quite possible that another passing star, through its gravitational pull, carried the ‘second sun’ away,” Loeb said.
  Also, beyond the Kuiper Belt, once thought to be the edge of the solar system, astronomers seem to have Another, more mysterious boundary zone, the Oort Cloud, has been discovered. It is a light-year thick and encloses the solar system like a massive galaxy “shroud”. The discovery of the Oort cloud provided a theoretical basis for the “second sun” conjecture.
  Because the formation of the Oort cloud is likely to be the masterpiece of the “second sun”. Theoretically speaking, for a single star system like the solar system, in the early days, the matter in the nebula should be basically absorbed by the stars and planets, and the Kuiper belt is unlikely to form in the edge area, and it will not form a large number of celestial bodies and substances. Oort Cloud. Astronomers have thought of a possibility: two stars were born in the early solar nebula, and the two were very close to each other, forming a binary star system, but the two stars have been unstable during the evolution process, and the other star gradually deviated from the orbit of the galaxy , and finally escaped the solar system. The part of the solar system close to the sun is gradually stabilized due to the gravitational influence of the sun, but its edge is greatly influenced by another star. During the continuous escape of this star, the Kuiper belt and the Oort are formed at the edge of the solar system. cloud.
  If you want to confirm the conjecture of “two suns”, you may have to go to the Oort cloud to find the answer. It’s just that even the most distant probe from the earth, Voyager 1, it will take tens of thousands of years to pass through the Oort Cloud. The conjecture about the two suns may only be confirmed by people in the future.

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