The desire to explore lies deep in the depths of human nature. It is driven by this desire that human beings cross the ocean, climb mountains, and travel to every corner of every continent, but what really brings the spirit of human exploration to the extreme are these two small aerial probes launched in the 70s of the 20th century-

"Voyager 1" with

Voyager 2 Time: 1972 Location: NASA Aeronautical Research Agency

"Professor Stone, I think you understand the importance of this program. This is a milestone for us. This will leave a significant mark in the history of mankind's exploration of the universe. Stone was looking at his leader in a daze, what was going on in his mouth, but Stone didn't care at all, he knew that it was nothing more than some flashy boasting, he was just thinking about the first sentence, human beings want to build a spacecraft that continues to fly, it first sits on a rocket to ignite, take off, pass through the atmosphere, enter low-earth orbit, get out of the booster, unfold the solar sails, start powering and start accelerating, sail over Mars, pass by Jupiter, pass Pluto, Neptune...... Finally, it slowly passes through the bubbles of the solar layer to interstellar space...... It was a beautiful dream.

It's a beautiful dream, so beautiful that you forget about the danger. Human beings are still dreaming of beautiful dreams, dreaming of intelligent life forms that exist in the universe and dreaming of the same beautiful and illusory dreams.

So humanity decided to bring the most sincere friendship to distant 'friends'. Attached to the aircraft was a postcard with the coordinates of the earth and the civilization of the earth, composed of the most stable gold element known on the earth.

'The project started as scheduled, and in the 70s, when space technology was just emerging, it was very difficult to build a spacecraft that could fly such a long distance.

First of all, the mass should be light, for the initial velocity of the rocket, the weight of 1 gram may change the design of the rocket, thanks to the emergence of new materials, it is strong and light enough, fully meets the requirements.

And so the precision manufacturing began. Finally, five years later, named Voyager 1 was finally launched.

Slowly rising under the eyes of the world, like a rising star. The rocket's internal fuel compartment reacts quickly in the engine, spraying a majestic blue flame at the tail of the rocket, and the high-speed air flow slowly sends the rocket into space according to the recoil (although it is actually several kilometers per second, it is still very slow from a distance).

At this moment, everyone cheered, looking at the rocket that lifted off, everyone would believe that in the near future, maybe soon, there will be intelligent life forms coming to Earth, holding the gold plate attached to the inner sheet, and sending out friendly greetings in the advanced language translator.

Since then, all mankind has been dreaming beautiful dreams. But this dream is too beautiful, like a piece of jade without flaws, and when you look through it, you can't help but feel cold, like a hell wrapped in the cloak of heaven.

However, in the decades since, humans have never seen an extraterrestrial visitor, and all they have received is a few noisy electromagnetic waves, but whether the source of this is from aliens or not is impossible to prove whether it is true or not.