The so-called heliosphere is a large bubble blown by the sun in the universe, and the heliopause is the edge of this bubble. Several of the major planets that have been discovered by mankind are all within the heliosphere. The sun generously shelters her people, using its radiation activities to carve out a region of its own in the vast universe. In the past, it was a haven for humanity. Without the existence of the heliosphere, all kinds of terrifying rays and energy bursts in the universe will make no grass grow on the earth, and no life can survive.

Now, this is also a safe haven for Xiao Yu. After stepping into the heliosphere, Xiao Yu withdrew from the curvature of the voyage and began to move forward in a conventional way. Here, Xiao Yu once again saw the traces he left 100,000 years ago.

"The tomb of seven billion human beings, Xiao Yuli."

The tombstone still orbits in its own orbit and orbits silently around the sun. The low-power candle that uses nuclear energy as an energy source still emits a faint light to illuminate the line. It wasn't designed to last that long, but like the Curiosity rover launched to Mars during the Earth era, the candle worked far beyond its design lifespan.

The Curiosity rover was designed to last only a few months, but it worked for several years, and by the time Earth was destroyed, it was still roaming Mars. If it weren't for the big incident of the collision of the wood and the moon, it would probably have continued to work.

"I'm back where I was born, back in the graveyard of humanity." Xiao Yu thought silently. After a few moments here, the Hope spacecraft began to move on.

Xiao Yu first visited Neptune, and Pluto and Uranus were on the other side of the Sun at the moment, so Xiao Yu did not see them for the time being. Looking at Neptune, which is as blue as the sea, some distant memories are gradually being opened.

Xiao Yu didn't stay here for long. Even Saturn and Jupiter are not observed in detail here, although one of Xiao Yu's main goals is the construction base left on Titan. Xiao Yu quickly passed through these places, through the asteroid belt as empty as the rest of the universe, and arrived at Mars.

Mars is still the same as it was when it left. The long passage of 100,000 years has not brought any significant changes to Mars, except that the craters on it have become more numerous. Mars is still the same as before, and between the yellow sands in the sky, there is an airiness of coldness, death, and desolation.

In fact, every planet Xiao Yu saw along the way had many more traces of impact on it. Even a gaseous planet like Neptune was not spared, and Xiao Yu still found many dark red impact spots on it.

Extremely high bursts of energy and temperature can lead to changes in the elemental composition of the region, as can differences in temperature. This means a change in color, and these color changes in a different way of expressing what happened in the past. By analyzing the size of these dark red spots and the composition of the elements in the area, Xiao Yu can even guess how big an asteroid is hitting this area.

No doubt. These asteroids all come from Earth's orbit. The impact of the Earth's explosion on the entire solar system is comprehensive and far-reaching, and frequent asteroid impacts will last for at least a few hundred million years. It was also during this time. A new equilibrium will be formed in the solar system.

Xiao Yu stayed in the orbit of Mars for a longer period of time. Xiao Yu hopes to find some traces of life on Mars, even if it is a primary trace of life. It's entirely possible, and the explosion of the Earth is a bad thing, but in some ways, it also has some positive aspects. The earth is teeming with life, both in the vast oceans and in the sky. Mountains or jungles, caves or deserts, the earth is covered with life. And after the Earth explodes, these lives will not necessarily be killed all. It is likely that there are some species with tenacious vitality that will survive. In this case, the Earth will become a giant life planter, carrying the fragments of life on Earth and will embark on a long interstellar voyage, like a dandelion sailing with the wind, Titan, Ganymede, Triton, Venus, Mars, these planets may become the second home of life on Earth.

But Xiao Yu was disappointed. In the past 100,000 years, Mars has undoubtedly withstood hundreds of millions of impacts from Earth debris, but there is still no sign of life on Mars. It seems that the seeds from Earth did not take root on Mars. This result made Xiao Yu a little disappointed.

Beyond the orbit of Mars, there is the orbit of the original Earth ahead. The Earth, of course, is gone, replaced by a ring-shaped cluster of asteroids. The evaporation of the gas has not stopped, and many asteroids still have long tails behind them. For example, after the Earth explodes, the sea water will condense into an icy asteroid, and when it is obscured by the rest of the debris and is not exposed to the sun, it will maintain a solid form, but if the orbit changes, the light from the sun can reach its surface directly, and the water will quickly evaporate and float backwards under the action of light pressure and high-energy particles, becoming a tail.

This is the comet.

The tails of countless comets completely cover the area, so much so that the sun is a little hazy from here. But Xiao Yu knew that this scene would not last long. On an astronomical scale, it can only exist for a very short time. After all, the total amount of evaporable matter is limited, and when they are evaporated by the sun, it will become an ordinary asteroid belt, just a little denser, and there is no other special feature.

The Hope spacecraft shuttles through a dense colony of asteroids. Many asteroids can also be seen with traces of the age of the Earth, such as some special lime structures - this comes from the remains of some buildings from the Earth age, and some special calcium phosphate structures - which come from the bones of large organisms from the Earth age.

There was a strange emotion brewing in Xiao Yu's heart.

In the long shuttle, Xiao Yu discovered a somewhat strange phenomenon. Some asteroids that contain water have some unusual redness, and these reds are appearing and disappearing according to a certain pattern. Specifically, when these places are irradiated by the sun, the water vapor begins to transpirate a lot, and these reds will appear quickly, and when these places are blocked by the rest of the asteroids, resulting in the inability to receive sunlight here, these reds will quickly disappear.

This phenomenon aroused Xiao Yu's interest. Xiao Yu began to approach an asteroid to get a closer look at the reds. Xiao Yu manipulated the Hope spacecraft to push away several asteroids blocking here, allowing this area to receive sunlight. Almost immediately, a large amount of water vapor emerged from the asteroid, and the hidden red began to appear rapidly.

Xiao Yu manipulated the Hope spacecraft to block some of the sunlight shining here, and immediately, the red under the shadow began to disappear, and the red part began to increase in the area next to it that was still directly exposed to the sun. It appears that the red substance that was originally within the shadow area has been transferred to the area of direct sunlight.

"It's a life." Xiao Yu thought silently, "It has a strong phototaxis and thermotaxis. When there is sunlight, they will quickly become active, and if there is no sunlight, they will quickly enter a state similar to hibernation, in order to resist the cold of the universe. ”

The Hope spacecraft is getting closer and closer to here, and more and more details about this life are being detected by Xiao Yu. Xiao Yu discovered that this is an algae-like organism that appears to be a plant, but has the rapid response mechanism of animals.

Xiao Yu has been silently observing here, learning everything about this creature, watching them go from silence to activity, and then from activity to silence. Chasing sunlight is their only mission, where there is sunlight there is energy, sunlight will melt the water ice, release the rich nutrients frozen in the water ice, mixed with the water vapor, once the water vapor appears, it means the arrival of food.

"An asteroid has a finite amount of water ice, so how can they survive when the water ice is consumed? They don't seem to have the ability to migrate between different asteroids. Xiao Yu pondered, "And in such a situation, species that cannot migrate between different asteroids are not qualified to survive." ”

They are not really animals, they have no legs, they cannot travel between different asteroids, and even if they do, the distance between planets is not something they can cross. Most importantly, these creatures depend on water ice for survival, without which they will die instantly. In the universe, there is no water ice.

Xiao Yu was observing here. Suddenly, another asteroid barged in and slammed into it. Immediately after the impact, a large amount of debris was splattered, including rocks, ice, and of course the algae-like red creatures that lived in the ice.

The sputtered material travels around here, some hitting other asteroids, and some traveling through space. But Xiao Yu knew that based on the current material density of the Earth's asteroid belt, it was unlikely that they would break out of this range, and they would eventually fall on the rest of the asteroids.

Looking at the small stones and Xiaoice blocks that were splashed out like scattered flowers of the Heavenly Maiden, Xiao Yu suddenly realized in his heart.

"I see, I see." (To be continued......)