The solar system is a collection of celestial bodies centered on the sun and all the gravitational forces of the sun.

The sun is a typical star in the Milky Way. It is located on the branch cantilever Orion arm, 26,100 light-years away from the center of the Milky Way. The solar system moves at a speed of about 240 cm/s, and it rotates around 226 million years.

In a broad sense, the domain of the solar system includes the sun, four earth-like planets, an asteroid belt composed of many small rocks, four gas-filled woody planets, filled with small frozen rocks, and are called the second small celestial area of ​​the Kuiper belt.

Outside the Kuiper Belt, there are ecliptic discrete disks and solar circles, and the still hypothetical Olt Cloud.

The protagonist of the solar system is the center of the sun. It is a main sequence star with spectral classification as g2v. It has 99.86% of the known mass in the solar system and dominates the solar system with absolute gravity.

According to the distance to the sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune in order, and 6 of the eight are surrounded by natural satellites.

The five dwarf planets include: Pluto, the largest known celestial bodies in the Kuiper belt - Bird and Ohdo, the largest celestial bodies in the asteroid belt, and the Erik, which belongs to the discrete celestial bodies of the zodiac.

Larger satellites in the solar system (more than 3,000 kilometers) include the moon of Earth, Jupiter's Galileo satellite Io (Eo), Europa (Europa), Io (Genemede), Io (Calisto) and Saturn's satellite Titan (Titan), and Neptune captured by Triton (Treyton).

Flying out of the solar system is a long-standing dream of mankind!

However, until now, many people have pessimistically believed that humans may never be able to fly out of the solar system, which is the cage that imprisons us!

Although Voyager One spent 36 years flying out of the solar system, the Earth's Eyes were about to fly out of the solar system.

But strictly speaking, this cannot be said to be the distance that humans fly, because they do not fly manned at all.

At present, the truly furthest flight distance for humans is only as far from Earth to Mars, and this distance is less than an astronomical unit.

"The Earth's Eyes should have reached Neptune." Five hours passed, and Haraki Chen was judging the journey of the Earth's Eyes in his heart. "It will fly out of the solar system soon. I don't know when humans can take this step."

Yuan Shichen knew in his heart that if he did not rely on alien technology, the aerospace technology currently mastered by humans would be far from meeting the needs of flying out of the solar system.

"The earth's civilization is still too small." Yuan Shichen sighed secretly.

The Earth's Pupil can only be regarded as a miniature detector. It is lightweight and has a weak body, so it can be accelerated to close to the speed of light through laser sail technology.

For a real manned spacecraft, it is simply a fantasy to use laser sails to accelerate to the speed of light.

"If you want to meet the giant spaceship needed for all human immigration, hey~"

It is already difficult for Yuan Shichen to imagine the answer to this question.

Through his experience working in the Interstellar Exploration Alliance in recent years, he can clearly feel the Alliance's strong desire to explore livable planets outside the solar system.

Combined with his previous conversations with Prince Ahmed and the Chairman, he could vaguely sense that there must be a force that threatens the existence of Earth civilization and forces humans to speed up interstellar exploration.

However, it is so difficult to find another "earth" in the vast universe with the existing technological strength of the earth civilization!!!

Given the wide scale of the universe, even if the speed of human spacecraft can be close to the speed of light, it will take nearly 10 years to reach the Centaur Alpha Galaxy, the closest star to the solar system. It will take hundreds of thousands of years to fly out of the Milky Way and reach the nearest Andromeda Galaxy, and it will take more than 00,000 years to travel around the universe.

Therefore, many scientists hope for the speed effect of Einstein's theory of relativity.

That is, when a spacecraft flies at high speed, time will expand and the distance will shorten. The closer to the speed of light, the more significant the speed effect will be. When it is infinitely close to the speed of light, time will almost stagnate and the size will be almost zero.

However, this is just a theory at present, and the truth is unknown.

"The team leader, according to the signal analysis, the Earth's pupil has just flew over Neptune. After about 1 hour and 39 minutes, it will pass through the orbit of Pluto."

The work report of the project team members interrupted Yuan Shichen's thinking.

"Okay, keep monitoring."

Harashiki decided to accompany the Earth's Eyes to fly out of the solar system and then go to work on other things.

He knew very well that Earth Eye has the most advanced intelligent flight operating system, and the extraterrestrial civilization project team also arranged a dedicated team for 24-hour uninterrupted monitoring. At the current stage, it doesn't make much sense for him to stay here.

After 6 hours and 46 minutes left by the Earth's Pupil, the Earth's Pupil flew through the orbit of Pluto.

After another three hours, the Earth's Eye said goodbye to all the planets surrounding the sun and began to sail towards more remote boundaries. It first passed through the terminal shock wave, which is the innermost layer of the heliosphere.

Here, the solar wind begins to slow down due to contact with interstellar medium, and the running speed of solar wind particles drops to subsonic speed for the first time, and heats up due to impact friction.

After passing through the terminal shock wave (tershock), the Earth's pupil will enter the helix (also known as the solar wind sheath). Once the solar wind reaches subsonic speed, it will be affected by fluid from the surrounding interstellar medium, and the pressure causes the solar wind to form a comet-like tail behind the sun.

"The Earth's pupil detected that the solar wind particle density suddenly dropped, and the plasma density increased by 4 times."

"The speed of the solar wind has dropped to zero, and the Earth's Eyes have crossed the top of the heliosphere, bid farewell to the sun and enter interstellar space."

Listening to the operator's report, Yuan Shichen nodded without saying a word. He knew that the Earth's Eye had left the range of the chivalrous solar system.

The solar wind "blew" here and was at the end of its strength, and it was replaced by low-temperature particles in interstellar space.

"The earth's pupils have flown through 120 astronomical units. The solar system where humans are located is indeed just a drop in the ocean in the universe!" Yuan Shichen sighed.

When the solar wind cannot "blow", the energy that the light sail of the Earth's pupil can receive will also be greatly reduced.
Chapter completed!