Compared with any other galaxy that Xiao Yu has visited before, the Mafei Galaxy has an obvious feature, that is, it has an unusually large number of giant stars. This means that the Mafei Galaxy has a large amount of gas until now.
Dust cloud content, and has been in an active period.
This is an obvious thing. The lifespan of giant stars is relatively short. If we want to maintain a large number of giant stars for a long time, then a steady stream of giant stars must continue to form, and for giant stars to continue to form, there must be enough
The content of interstellar dust clouds serves as support.
Active means unstable, and instability is the natural enemy of intelligent life. After the civilization level reaches a certain level, the civilization will have a certain ability to withstand risks. For example, for primitive humans, a major earthquake can cause the civilization to become extinct.
As for Xiao Yu now, the destruction of a river system cannot harm him. Xiao Yu can escape in advance before the destruction of the river system.
"Maybe the Mafei Galaxy is a dead galaxy, but that's not necessarily true." Xiao Yu thought secretly.
The Mafei Galaxy is just a foothold in Xiao Yu's long journey. Xiao Yu's next target is the Feiyuan Galaxy, which is the core of the entire Virgo Super Galaxy Cluster. The Feiyuan Galaxy is too big, and being large means that the base of civilization is sufficient.
Xiao Yu hopes to encounter enough civilizations there and communicate with them to once again improve his technological development.
Facing the frequent and active stellar activities, Xiao Yu stepped into this completely unfamiliar river system.
"Perhaps it is precisely because of the collision of river systems that Mafi 1 has such a large amount of interstellar dust clouds. Compared with billions of years ago, the intensity of the movement of Mafi 1's river system has been reduced a lot. In the river system
In the early stages of the collision, it was probably a starburst galaxy." Xiao Yu thought secretly and slowly moved towards the center of the river system.
In the process of continuous advancement, a large number of river-level detectors were sent out. These detectors have perfect self-repair and self-charging as well as self-protection capabilities based on seventh-level civilization technology. They are Xiao Yu's eyes. They are
It allows Xiao Yu's sight to spread throughout the entire river system.
When Xiao Yu's main fleet arrived at the core of the river system, the detection range of these detectors had spread to half of the river system. During the previous seven thousand years of long journey, due to the technological supplements of microscopic civilization,
.Xiao Yu's technology has once again made great progress, so Xiao Yu can now have the ability to detect a river system in such detail.
However, the results of the detection disappointed Xiao Yu. Under the large-scale detection, Xiao Yu did not discover even an ordinary life planet, not to mention an intelligent civilization. The Mafei galaxy that appeared in front of Xiao Yu, although active, was not
It is a desolate and dead place. There are no intelligent creatures here. There are only stars that are constantly living, dying and disillusioned, slowly evolving here according to the laws of nature.
"The stellar activity here is too active. The short-lived giant stars scattered throughout the entire galaxy may be the killers that destroy the seeds of the birth of civilization. A supernova explosion of a giant star can indiscriminately destroy biological seeds within at least a few hundred light-years.
This is like spraying pesticides continuously in the Mafei Galaxy. Even if there are sprouts of life, they will have been killed by this high-strength pesticide." Xiao Yu thought with some sigh.
.
The birth of life is really a very harsh natural selection process. In the age of the earth, people often raised questions about scientists' search criteria for searching for extraterrestrial life, such as: "Why does extraterrestrial life definitely need water? Life on earth does.
Water, does extraterrestrial life definitely need water? Why does life have to exist on planets? Life on earth needs a suitable temperature to survive, so does extraterrestrial life also need this temperature?"
According to this standard, it seems that life is not so demanding on the environment. Different environments will give birth to different life forms, just like the Mafei Galaxy at the moment. There should also be creatures that adapt to the environment here.
But the facts told Xiao Yu that this was wrong.
It is not that extraterrestrial life will definitely need water, but the birth of life has a prerequisite, that is, a long-term, stable, and protected environment. Newborn life is very fragile. There must be no objection to this, so they
You must need some kind of protective device to allow you to develop slowly and spend a long time in exchange for your ability to gradually adapt to the environment.
The cosmic environment is very dangerous. Not to mention asteroid impacts, supernova explosions, high-intensity radiation areas after the death of stars, etc., such things are everywhere in the universe. Even if all these threats are not there, then there are still
As for the threat from the host star around which your own planet revolves, you must know that a star is not a stable thing. When it sends out light and heat, it also sends out a large amount of harmful rays. Perhaps these rays should not be called
A harmful name, but they are unstable, and newborn life cannot afford any instability.
Among the radiation of infrared rays, X-rays, visible light, gamma rays, these four kinds of light, as well as neutrinos, beta decay and many other radiations, only visible light is the most stable. Therefore, it is inevitable for life to evolve to adapt to visible light.
After adapting to visible light, the rest of the radiation is harmful.
This requires water, an atmosphere, and a magnetic field to provide protection for life. Why water? Because water is a very common substance in the universe. Hydrogen is common, and oxygen is also common, so water is common, so water
It is a common indicator for searching for extraterrestrial life, rather than other liquid substances, such as methane.
It’s not that liquid methane cannot provide protection for life, but methane is more complex than water and is rarer than water. From a probability perspective, it is more reasonable to use water as a search indicator.
Gaseous water is too active and thin, and solid water has lost its basic fluidity, so what can support the existence of life must be liquid water. This puts forward requirements for the temperature in the environment, because obviously, the temperature of the planet
If it is too low, water will freeze, if it is too high, water will evaporate. There are requirements for temperature, which require the distance of the planet from the star. At the same time, there are also requirements for the activity intensity of the star - such as a newborn star.
The activity is too intense and the radiation is too strong, so the chance of life being born around it is very low. For example, an aging red giant star is too big and too unstable, so life generally cannot be born around it.
For example, you cannot be in a place with too many asteroids. Asteroid impacts will have a devastating impact on nascent life, which incidentally raises a secondary requirement - it is best to have a few giant gas giants outside the planet.
Planets, because these gaseous planets can provide complete protection for the inner living planets, it is best to have a relatively large satellite. This satellite can not only provide it with the last layer of protection, but also cause tides.
Material exchange on the planet...
There is actually only one condition for the birth of life, and that is stability. Conditions such as liquid water are the best description of stability.
Therefore, the Ma Fei galaxy that appeared in front of Xiao Yu at this moment did not evolve life.
"Perhaps, before the galaxies collided and merged, there was life in the Mafei galaxy, but that era was too long, and those lives may have perished long ago. It took too long, and even the remains cannot be preserved."
Xiao Yu sighed secretly in his heart.
The sea has changed, time has changed, hundreds of millions and billions of years have passed by in a hurry, the originally bustling galaxy has become dead, the originally desolate galaxy has become prosperous, the newborn stars finally exploded into dust, and the dust condensed again and became the next generation.
The stars... everything is slowly evolving under the control of the invisible hand of time.
With this sigh, Xiao Yu's main fleet came to the core of the river system and visited the central black hole of the Mafi 1 galaxy. Compared with the Milky Way, the mass of the central black hole of Mafei 1 is much lower. It is only about thirty
It is about 10,000 times the mass of the sun. Its black hole activity has almost stopped. Although there are a large number of gas and dust clouds in the Maffei galaxy, these things have not become its food.
This is a sleeping ancient beast.
Xiao Yu did not try to disturb its sleep. Xiao Yu's fleet quietly bypassed it and continued to move forward. But at this time, Xiao Yu once again made a new discovery.
An astonishing thing appeared in front of Xiao Yu. It was a palace - although its appearance was different from any palace Xiao Yu understood, except for the name palace, Xiao Yu really didn't know
How to call it.
It has obvious characteristics of technological creations, such as smooth appearance, precise geometric structures, things that are obviously artificial light sources, such as those spaceships that are orbiting...
After Xiao Yu thought that the Mafei Galaxy was just a dead river system and was disappointed with this river system, this palace unexpectedly appeared in front of Xiao Yu, leaving Xiao Yu stunned.
A desolate, simple, majestic, vast, advanced, and powerful atmosphere rushed towards Xiao Yu. It seems that any words of praise used on this palace are not enough to describe its greatness. This is not an illusion.
Just one aspect of the words was enough to make Xiao Yu sigh like this.
It is too big, too big to be imagined. The largest battleships Xiao Yu has ever built, the star-class battleships are as small as dust in front of it. Even a huge star is nothing in front of it.
Not on.
The size of this palace is measured in light years.
PS: Rainbow just wants to do its best to present a universe imagined by Rainbow in front of everyone, whether it is a description of the fifth-level civilization, various technologies, various astronomical phenomena, or certain events,
For example, the description of the birth of life in this chapter, etc., are all working towards this goal. This is the original intention of Rainbow, and the protagonist's upgrade is just to have a broader stage and vision. Compared with Rainbow's original intention
, it is secondary. If you say the rainbow is in the water, you will recognize the rainbow.
This is what Rainbow has always insisted on. This is what Rainbow is. In the foreseeable future, Rainbow has no plans to change. Although if it changes and is written in a more refreshing style, Battleship will have better results, but it also
It will lose its own characteristics and disappear into the public. This is unacceptable to Rainbow.
If some book lovers just want to see the protagonist killing everyone and other exciting plots, but are not interested in the description of various astronomical events and thoughts about the universe, they can read other books to change their mind.