Sirius is located about 8.7 light-years from the Solar System, making it the ninth closest neighbor to the Solar System. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

However, the interior of this powerful binary star system is very clean.

This clean means that in the region close to these two powerful stars, there are no planets, and even small objects and comets are basically invisible. In fact, of all the binary systems discovered so far, there are very few binary star systems with planets.

This is only because the gravitational pull of a binary system, although simple, is very "rough", especially in a binary system like Sirius, where one of the two stars in the system is Sirius A, which is more powerful than the Sun, and the other is a more terrifying white dwarf. The gravitational pull of these two stars is actually quite terrifying.

Planets orbit stars, they are captured by the gravitational pull of stars, and as long as there is no interference from external forces, these planets will always revolve around the stars in the middle.

However, in a binary star system, because the two host stars revolve around a common center of mass with each other, even if there are planets in the vicinity of the host star, when the gravitational pull of the two host stars meets, these planets will either be captured by the gravitational pull of the other star and break away from the gravitational pull of the first star, or they will be directly torn to pieces by the gravitational pull of the two stars.

It's like the poor rocky planet that Tang Feng saw in the South Gate II star system some time ago, because of this condition, was torn in half by the strong gravitational pull of the three stars.

As for the rocky planet that is constantly running around Centaur Alpha Star B, the reason why it is not torn to pieces by the gravitational pull of the star is because the planet is too close to Star B, and the gravitational pull of Star B has directly and completely locked the planet. Therefore, although the planet that Tang Feng once saw running wildly, although it will not be pulled by Star A or Proxima Centauri, its final fate is already predestined, that is, it will be pulled into the arms of Star B and finally merge with Star B.

Therefore, it is rare for stars to have planets in binary and multi-star systems.

Of course, in the Centaur Alpha star system that Tang Feng encountered earlier, the three stars all have planets, that is because in this triple star system, the three stars are too far away from each other, especially Proxima Centauri, this red dwarf star revolves around the center of mass for hundreds of thousands of years, so there will be planets in a very close range around these three stars, because these planets have been completely locked by their respective host stars, even when the gravitational intersection of the three stars, It won't be pulled away by other stars.

As for the wise-j1049 binary star system that Tang Feng encountered, although they are a binary star system composed of brown dwarfs, due to the appropriate distance from each other, Tang Feng did not find any planets in this binary star system.

The situation with Sirius is somewhat similar to that of the Wise-J1049 binary system, but the situation with Sirius is clearly more extreme. After all, Sirius's two main stars are far more powerful than the two brown dwarfs in the WISE-J1049 binary system.

As a result, there are hardly any active objects in the airspace near Sirius' two main stars. Even if one or two mischievous little objects or comets occasionally rush in from the distant Oort cloud region, the end result is that before they get close to the two powerful host stars, they will be torn to pieces by two powerful gravitational forces from different directions.

However, when drawing the map of Sirius, Tang Feng discovered that there were still a large number of planets and other celestial bodies in the airspace very far away from the two main stars.

After a little pondering, Tang Feng understood why this situation occurred.

Obviously, the planets don't dare to get too close to the two bosses, because they are afraid of being played to death by the two bosses. But we can't get your boss, won't we be far away? As a result, except for those planets that don't know whether they are alive or dead, and who are "divided by two horses" alive by the two bosses, the other planets that are far away are alive and well.

This region is at least 65,000 AU, or about one light-year, from the common center of mass of Sirius, which is more than 650 times the solar system's solar sheath (the farthest distance that the solar wind can reach) and 0.2 light-years farther than the solar system's Oort cloud from the Sun.

At first, Tang Feng thought that this area was Sirius's Oort cloud, but it turned out that in addition to this area densely packed with at least forty large celestial bodies that were larger than the planetary standard, there was also an area with an even greater number of celestial bodies.

This area is located in the airspace about 1.6 light-years away from the center of mass of Sirius binary, and the situation there is no different from the Oort cloud in the solar system, which gathers hundreds of millions of various celestial bodies of various sizes.

Tang Feng knew very well that these celestial bodies that looked very large but had no regular stars were comets that originated from the Oort cloud of Sirius, and now these comets are still in the extremely cold region, and the temperature here is not enough to melt the ice on the comet to produce water vapor, so these comets now have no tails.

But once these comets get to a distance of about 5 to 600 million kilometers from Sirius A (comets in the solar system have their tails about 300 million kilometers from the Sun, and Sirius A radiates much more strongly than the Sun, so the comets here have their tails earlier), these black-looking comets will have small tails, and then as they get closer to Sirius A, their tails will become more and more spectacular.

It's just that these comets that look extremely spectacular will be brilliant once in a lifetime, because in this binary star system, it is difficult for comets to escape from the gravitational pull of the two main stars, and in the end, these comets that pull the tail of the comet tens of millions of kilometers or even hundreds of millions of kilometers will eventually be torn to pieces by the gravitational pull of the two main stars at their most beautiful moment.

Obviously, this region, about 1.6 light-years away from the center of mass of the binary star system, is Sirius's true Oort cloud. And the area densely packed with more than forty planets that Tang Feng saw before was actually the area where Sirius, the real planet of the binary star system, was located.

Because they are far enough away from the two host stars, the planets are not orbiting around any of them, but quietly orbiting the center of mass of the binary star system. Their orbital radius is large enough to guarantee that they will not be pulled by any of the binary stars, nor will they be torn to pieces by the common gravitational pull of the binary stars.

These planets are actually the real planets in the Sirius binary system. (To be continued.) )