Chapter 1898 Brown Dwarf

Chapter 1898 Brown Dwarf

And the orbit of this small star may also be a huge ellipse. Its aphelion is very far away from the sun, but its perihelion may be relatively close to the sun.

When this solar companion enters the perihelion orbit, it may have a considerable impact on nearby celestial bodies. This is because the solar companion, although compared with the sun, appears relatively weak. But compared with other planets, it is still very large. Even Jupiter's volume and mass are not as large as the solar companion.

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 comes to perihelion and its orbit is changed by this solar companion, it may cause damage to some nearby large planets. Because the comet will break into many small "ice cubes" when it is at perihelion.

If at this time, this solar companion just passes the sun's perihelion orbit, it may cause comet fragments to fly towards the earth.

Although the comet is not very big, but relatively speaking, it is still very big. Each fragment of a comet may be as large as a hill. When these comet fragments hit the earth, they will pose a serious threat to life on earth.

In history, several mass extinctions of life on earth may be related to this solar companion. It is the perihelion of this solar companion, which affects the nearby asteroids, causing some disasters on the earth.

Because, this companion star is always 30 million years away, it will affect life on earth. So, it makes people feel that it is intentionally seeking revenge. Therefore, some astronomers call this theoretically existing solar companion star Nemesis. '

After listening to what Zhao Zhongyao said, everyone understood why this sun companion star was called Nemesis Star. It turns out that it just likes to go to the vicinity of the sun every once in a while to cause some troubles to the big planets there, especially to have a huge impact on life on the earth.

Of course, the life on earth is constantly evolving in the midst of disasters one after another. If there were not several major disasters, perhaps life would not have evolved into what it is now.

Just like the extinction of dinosaurs at that time, if an asteroid hit the earth did not occur at that time, causing the extinction of dinosaurs, then human beings would not have appeared on the earth later and gradually ruled the earth.

In other words, without the extinction of dinosaurs, there would be no prosperity of human beings. Nature is like this, constantly evolving and evolving in the endless life.

After hearing what Zhao Zhongyao said, Feifei said again, "Dad, so this little star is the companion star of the sun. Was it born with the sun?" '

At this time, Zhao Zhongyao said again, ‘This is very possible, because five billion years ago, the solar system was just an ancient nebula. This nebula was formed after the aging explosion of the previous generation of stars. At that time, after the nebula in the solar system continuously converged, a central celestial body with a large mass was formed in the middle.

Of course, the volume of the nebula is very large, not only one central celestial body will be formed, but two or even multiple central celestial bodies may be formed.

However, after the formation of these central celestial bodies, they started the process of competing and engulfing each other. Although at the very beginning, a nebula may form several central objects. But after a long period of mergers, there may be only 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 solar companion star, which is the Nemesis star this time. '

After hearing what Dad said, Feifei said again, 'Dad, then look at the star map for any new instructions. We should go to that planet to find the twelfth amethyst gem. '

At this time, Zhao Zhongyao took out the amethyst gemstone with the star map and looked at it again. After he looked at it, he said,'There is an update again, this time it is a brown dwarf. '

'What, brown dwarf. ’ When Feifei heard this, he was very puzzled, not understanding what was going on with this brown dwarf.

‘Dad, just now the star map suggested Nemesis, and now it shows a brown dwarf, what is going on here, is there another small star here? ’ Said Feifei.

After hearing Feifei's words, Zhao Zhongyao smiled and said, 'It's not another small star, this brown dwarf is that nemesis star. '

When Feifei heard this, he said inexplicably, 'Dad, what's going on, why is it just a star, and why are there two different names on the star chart. '

After Zhao Zhongyao heard this, he shook his head and said, "I don't know why there are two different names on the star map. It may be the companion star of the sun. It is too important for us to find the twelfth amethyst gem." important. '

'Yeah! What happened to the brown dwarf that the star map suggested, and how did it have such a name. ’ Feifei asked again.

‘Okay, since you don’t know what brown dwarfs are, let me explain some astronomical knowledge to you! After Zhao Zhongyao finished speaking, he thought for a while and told everyone some astronomical knowledge about brown dwarfs.

A brown dwarf is a substar with a mass between the heaviest gas giant planet and the lightest star, specifically, between 13 and 75 or 80 Jupiter masses, or about 2.5x1028 kg to about 1.5x102

9 kg.

Below this range are sub-brown dwarfs (sometimes called rogue planets), and above that are the lightest stars, red dwarfs. Brown dwarfs may have only convection, but no depth of stratification or chemical differentiation.

Unlike stars on the main sequence, brown dwarfs are not massive enough to sustain nuclear fusion reactions that fuse hydrogen into helium in their cores. However, their masses between 13 &nbsj and 65 &nbsj are considered to be able to undergo nuclear fusion of deuterium and lithium, and it is still debated whether it is better to define brown by the process of formation instead of nuclear fusion reaction. dwarf star.

Brown dwarfs are known as "failed stars" that don't have enough mass to become burning stars, but are still far more massive than the solar system's largest planet, Jupiter. Astronomers have discovered giant planet-like storms on these odd worlds that rival the Great Red Spot on Jupiter.