Chapter 1724: Brown dwarf

Chapter 1898: Brown Dwarf
The orbit of this small star may also be a huge ellipse. Its aphelion is very far away from the sun, but the perihelion may be relatively close to the sun.
When this solar companion star enters the perihelion orbit, it may cause considerable impact on nearby celestial bodies. This is because this sun companion star, although compared with the sun, appears to be relatively weak. But compared with other planets, it is still very large, even Jupiter's volume and mass are not as large as the sun's companion star.
Because of this, when this solar companion is relatively close to the sun, it may have a huge impact on some near-Earth asteroids and may change the orbits of these asteroids.
At this time, if a comet also arrives at the perihelion and its orbit is changed by this solar companion, it may cause damage to some nearby large planets. Because when comets are at perihelion, they will break into many small ‘ice cubes’.
If at this time, the sun companion star just passed the sun's perihelion orbit, it might allow the comet's fragments to fly towards the earth.
Although the comet is not very large, it is relatively large. Each piece of comet fragment may be as big as a hill. When these comet fragments hit the earth, they will pose a serious threat to life on the earth.
In history, several mass extinctions of life on Earth may have been related to this sun companion. It was the perihelion of this companion star, which had an impact on nearby asteroids, and caused some disasters on the earth.
Because this companion star is always 30 million years away, it will have an impact on life on Earth. So, it makes people feel that it is intentional to get revenge. Therefore, some astronomers call this theoretical solar companion star Nemesis. ’
After hearing what Zhao Zhongyao said, everyone understood why this sun companion star was called Nemesis. It turns out that it just likes to go to the vicinity of the sun to cause some trouble to the big planets there after a while, especially to have a huge impact on life on Earth.
Of course, life on earth is constantly evolving in the course of disasters. If there were not several major disasters, perhaps life would not evolve into what it is now.
Just like the extinction of the dinosaurs at that time, if there was not an asteroid hitting the earth that led to the extinction of the dinosaurs, then it would be impossible for humans to appear on the earth later and gradually rule the earth.
In other words, without the extinction of dinosaurs, there would be no prosperity for human beings. Nature is just like this, constantly evolving and evolving in endless life.
After hearing what Zhao Zhongyao had said, Feifei said again, ‘Dad, in this way, this small star is the companion of the sun. Was it born with the sun? ’
At this time, Zhao Zhongyao said again, ‘this is very possible, because the solar system was just an ancient nebula five billion years ago. This nebula was formed after the previous generation of stars exploded in aging. At that time, this nebula of the solar system was continuously converging, and a massive central celestial body was formed in the middle.
Of course, the volume of the nebula is very large, not only will form a central celestial body, but also two or even more central celestial bodies.
However, after the formation of these central celestial bodies, they started a process of phagocytosis with each other. Although at the beginning, a nebula may form several central celestial bodies. But after a long period of mergers, there may be one or two central celestial bodies left.
The solar system is like this. After continuous evolution, a huge star system with the sun as the center has been formed. Of course, the sun does not exist alone, it also has a sun companion star, this time the nemesis star. ’
After hearing what my father said, Feifei said again, ‘Dad, then you can see if there are any new instructions on the star map. We should go to that planet to find the twelfth amethyst gem. ’
At this moment, Zhao Zhongyao took out the amethyst gemstone with a star map and took a look. After he looked at it, he said, ‘There is another update. This time it is a brown dwarf. ’
‘What, brown dwarf. When Feifei heard this, she was very puzzled, and she didn't understand what was going on with this brown dwarf.
‘Dad, the star chart just now suggested the Nemesis star, and now it has suggested a brown dwarf star. What is going on here? Is there another small star here? Said Feifei.
After hearing what Feifei said, Zhao Zhongyao smiled and said, ‘It’s not another small star, this brown dwarf star, it’s the nemesis star. ’
When Feifei heard it, he said in a puzzled manner, ‘dad, what’s going on, how is it a star, why are there two different names on the star map? ’
When Zhao Zhongyao heard this, he shook his head and said, "I don't know why there are two different names on the star chart. It may be this sun companion. It is too great for us to find the twelfth amethyst gem. It's important. ’
'Yes! What happened to this brown dwarf star that the star map suggested again, and how could it have such a name again. Feifei asked again.
‘Okay, since you don’t understand what brown dwarfs are, let me explain some astronomical knowledge to everyone! After Zhao Zhongyao finished speaking, he thought about it for a while and told you some astronomical knowledge about brown dwarfs.
A brown dwarf is a sub-star with a mass between the heaviest gas giant planet and the lightest star. Specifically, the mass is between 13 to 75 or 80 times the mass of Jupiter, or about 2.5×1028kg to about 1.5× 1029kg.
Below this range are sub-brown dwarfs (sometimes called wandering planets), and the lightest stars are red dwarfs. Brown dwarfs may only have convection without stratification or depth of chemical differentiation.
Unlike stars in the main sequence, brown dwarfs have insufficient mass to sustain the nuclear fusion reaction of hydrogen fusion into helium in the core. However, their masses between 13MJ and 65MJ are considered to be capable of nuclear fusion of deuterium and lithium. People are still debating whether the brown dwarf can be defined by the process of formation instead of nuclear fusion reaction.
The brown dwarf is called a "failed star". It cannot become a burning star due to its insufficient mass, but its mass is still much greater than Jupiter, the largest planet in the solar system. Astronomers have discovered huge planet-like storms on these weird planets, which are comparable to the Great Red Spot storm on Jupiter.