Interstellar Industrial Age

Around 11:30 a.m. on June 24.

Here in the space port area of ​​the 'Tiangong' space station, the 'Houyi' and 'Chang'e' spacecraft have completed their rest and supplementary notes. Quietly waiting for the command to go to the moon.

"Flying around the ground~"

Soon, the instructions from the ground command and control center were conveyed to the two spaceships and the 'Tiangong' space station.

The mechanical arms that fixed the two spaceships slowly loosened, and the two spaceships began to slowly fly away from the space station and began to fly around the earth in orbit.

The reason for choosing to fly around the earth, instead of directly choosing to fly in the direction of the moon, involves the issue of the initial speed of the spacecraft.

The distance between the earth and the moon is about 360,000 kilometers to 400,000 kilometers, with an average distance of 380,000 kilometers. Such a long distance is definitely the farthest place that human beings have set foot on.

Because the distance is too far, the spacecraft must gain enough speed, otherwise it will take too long, which will be a test for the materials and astronauts carried on the spacecraft.

Flying in orbit around the earth, relying on the earth's universal gravitational force, the orbit of the spacecraft flying around the earth is an elliptical orbit, which is slow at perigee and fast at apogee.

Because the gravitational force of the earth can be used to give the spacecraft a good initial velocity, which can greatly reduce the energy consumed by the spacecraft to accelerate.

The 'Houyi' and 'Chang'e' spaceships are constantly flying around the earth's orbit. Through the adjustment of the orbits, the speed of the two spaceships is getting faster and faster.

"Fly to the Moon~"

When the time came to 12 o'clock, the order from the ground command center was conveyed again.

The 'Houyi' spacecraft just flew to the apogee of the orbit at this time, and when it was the fastest,

"Boom~"

The auxiliary fuel propulsion system on the 'Houyi' spacecraft began to work, and a bright tail flame was ejected from the back of the spacecraft, which was continuously elongated in space and soon became a long tail.

With the help of the auxiliary power system, the 'Houyi' spacecraft escaped the earth's gravity very smoothly, and galloped rapidly towards the moon.

At this time, with the help of the earth's gravitational force, it obtained a good initial speed of 20 kilometers per second.

If it flies towards the moon at this speed, it will take about 6 hours to reach the moon.

However, the speed of the spacecraft is still not enough. The fuel propulsion system on the spacecraft is still spraying flames all the time, and it is slowly accelerated. When the speed reaches 40 kilometers per second, it will stop working.

Behind the 'Houyi', the 'Chang'e' spacecraft soon got rid of the shackles of the earth's gravity in the same way, and dragged its long tail towards the moon.

The speed of the two spaceships continued to accelerate. After half an hour, their speed reached the set speed of 40 kilometers per second. The auxiliary power system was turned off, and the spaceship began to fly towards the moon in the void by inertia. .

When flying in interstellar space, the most energy-intensive is in the two stages of acceleration and deceleration at the beginning. During this period of time and the distance in between, almost no energy is consumed, and it only needs to rely on inertial flight.

And the reason why the two spaceships stop accelerating after they accelerate to a speed of 40 kilometers per second, there is a deep truth in this.

According to Einstein's mass-energy formula, we all know that the faster the object carries, the greater the capacity. In reverse thinking, the faster you accelerate the speed of an object, the greater the energy consumption. .

After the speed of the spacecraft reaches 40 kilometers per second, if you continue to accelerate it, the energy consumption will become larger and larger, and the effect will become smaller and smaller.

It is very likely to consume 1 unit of energy, and its speed can only be increased a little,

Very uneconomical.

More importantly, when you are about to reach the moon, you also need to decelerate it. The faster it is, the more energy it will consume when decelerating.

Therefore, after comprehensive consideration and calculation by scientists, after fully considering the energy carried by the spacecraft, the speed of 40 kilometers per second is the most suitable.

In the vast and vast cosmic void, the 'Houyi' and 'Chang'e' spaceships are like two small fireflies constantly flying in the endless void.

Although their speed is already very fast, the speed of nearly 40 kilometers per second, which is definitely the fastest speed of human beings at present, and this speed can only be achieved in the environment of space.

But compared to the vast and vast universe, the two spaceships seem to be still at the same origin without any movement.

In the vast universe of stars, you will even have the illusion that you seem to be standing still, always at a point.

No matter from that place, there seems to be no change. The starry sky is still a starry sky. It is dark, dim, and the stars are bright. The road ahead seems to be endless.

Only when I look back at the earth every half an hour will I find that the earth seems to be slowly getting smaller, and the moon ahead is slowly getting bigger in the field of vision.

The two spacecraft stopped accelerating, and the astronauts on the spacecraft also fell asleep.

They need to maintain a strong energy and physical strength, the process of inertial flight takes a few hours, they can just take this to get a good night's sleep.

When they get to the moon, exciting times will come, and more importantly, there are many tasks waiting for them, and then it will not be so easy.

These astronauts usually have special training. They say that they all fall asleep quickly. If it were an ordinary person, it is estimated that they would not be able to fall asleep at this time.

Because the moon is slowly getting bigger in the field of vision, exuding a bright brilliance, which is fascinating, and the earth behind it also exudes a bright brilliance at this time, which is very beautiful.

The earth ground control command center did not disturb the rest of the astronauts temporarily. The automatic control system on the spacecraft kept in touch with the earth side at all times. When the time came, someone would naturally remind them to wake up the astronauts and begin to enter the tense atmosphere. Moon landing stage.

Qin Yi was a little bored. There was nothing at all when the spacecraft was coasting, and it was the safest time.

After thinking about it, Qin Yi returned to his dormitory and prepared to take a nice nap. Many scientists, engineers, etc. had the same plan as Qin Yi at this time.

Astronauts in space need to maintain vigorous energy, and the same is true for these scientists and engineers, because when the real moon landing, scientists and engineers are just as busy, and now they also need to seize the time to take a good rest.

Qin Yi returned to his dormitory, and habitually took out his mobile phone to see if there was anything on the company's side. There was nothing on the company's side, but Wen Xueying sent a lot of missing messages.

Qin Yi saw the message, and his face was full of happiness. After thinking about it, a love poem emerged and sent back.

Just as I was about to turn off my phone and take a nap, a message popped up on WeChat, not surprisingly, it was about the manned moon landing.

The TV station broadcasts the whole live broadcast, which is very boring when it relies on inertial flight, so it also invited several experts and scholars to play their roles and began to popularize some knowledge of the universe, interstellar and space.

Qin Yi clicked in and began to look at it with interest.

"Everyone has seen it now that the auxiliary power systems of the Houyi and Chang'e spacecraft have been turned off, and they have begun to rely on inertial flight in space."

"In space, because there is no air, in theory, it does not have any friction, so relying on inertial flight is the most energy-saving stage."

"According to my calculations, the two spacecraft will probably fly by inertia for more than 2 hours, after which it will start to slow down."

"Why slow down?"

"Because the gravitational force of the moon is very small, of course, this is compared with the earth, because the gravitational force of the moon is small, so once the speed is too fast, the gravity of the moon cannot catch the two spaceships, and the two spaceships are very likely to The moon passed by."

"So manned landing on the moon is a really dangerous stage. Whether this can be captured by the moon's gravity is considered a problem. Once the speed is too fast and it passes by the moon, it will be bad."

"So the speed of the two spacecraft has to be slowed down enough to be captured by the moon's gravity, and this process is going to be very time-consuming."

"The moon's gravity is too small. Its escape velocity is only 2.4 kilometers per second. Now the speed of the spacecraft is 40 kilometers per second. It is conceivable that it will take a long time for the spacecraft to decelerate."

"This is the next very important key point~"

"Okay, thank you Professor Zhang for sharing the knowledge for us. At first, I thought it was enough to fly directly to the moon at this speed. Now it seems that there is still a lot of knowledge about the routes in this interstellar universe."

"Let's ask expert Wang to share some of his views for us."

"Okay, in fact, Professor Zhang has said a lot just now, and he has said a lot. The most energy-saving way to navigate in the interstellar universe is to use the most likely large-mass celestial bodies, such as the earth, moon, Mars, etc. The gravitational force of mass celestial bodies accelerates and decelerates.”

"Why did the Wandering Earth, which was popular in the past few years, approach Jupiter first in the process of wandering, in fact, it is to use Jupiter's huge gravity to obtain greater acceleration..."

Qin Yi immediately became interested after watching it for a few minutes. Although the content of these experts and professors who were invited to the TV station to give guest lectures was not wrong, it was good for ordinary people to know and understand some of the universe. Knowledge of sailing.

But for a scientist of Qin Yi's level, there is no need for any study at all. Qin Yi has long been familiar with these things.

"It's also very good. Give ordinary people more popular science and popular science, and increase everyone's knowledge of space science. However, the content still needs to be guided a little. The main thing is to depict space as gold everywhere, so as to attract more people. into interstellar space."

"You can talk more about the resources and minerals on the moon, interests are the biggest driving force~"

PS: The first order is very important~ Everyone come to the starting point to support the old cow~~