The start of science and technology

Through Wang Qing, Du Xingyu contact Hawaii Harre Akala Strip Station.

This Observatory is one of the main executives of the "Far Star Program" in the Mi-Star, the panoramic plan is also an astronomical plan for optical measurement of all-day bodies with panoramic patrol telescope and rapid response system.

"We have four calm-ups and eight-me-level super wide angular astronomical telescope. Every four to seven days patrol the starry sky, compared with the previous inspector results, find out the asteroid or comet with threatening of the earth." Harley Akara Observatory, At the same time, it is the female professor of the University of Hawaii Astronomical College.

"In fact, through this program, we have discovered some new asteroids or celestial bodies of Kieb."

Du Xingyu said in English: "So Professor Bei, do you find a small star in a recent track trajectory? It is threatened to the earth."

Professor Beishi shook his head and said: "There is no, our observations on Ke Ib belts are also very limited. The original intention of our fans plan is to observe asteroids or comets that Kebi may threaten the earth."

"If there is a small planet that is thrown into the Earth, there is a few tens of kilometers, and we are also difficult to observe directly. Unless it is a distance from our distance, we have arrived in the distance of the King Star or Neptune to the earth, we It may be observed in advance. "

"That distance is flying to the earth, about 20 years. At that time, we can only pray to God, isn't it?"

"I hope it will not be the case." Du Xingyu said.

He is slightly tone in his heart. Since it is the case, he still has some time before observing the asteroid.

"Professor Berate, very happy with your exchange. If there is an important observation message in the future, it will continue to communicate in the case of conditions permit." Du Xingyu said.

"Very happy." The other party did not refuse.

......

"I foreseen, will it happen?" Du Xingyu doubtfully, if the original development trajectory, after ten years, Huaxia will settle in the moon, and the asteroid will destroy human.

It can now be seen that this should not appear in ten years.

He asked the technology simulator and want to know the answer.

The technology simulator replies: "Time and space annihilation bomb is a universe rule weapon, no entity. My ability can only collect the information in the universe, you make this time-space development trajectory has deviated from the world. The track is also affected by the spatial annihilation bomb. "

"Destroying the disaster of human beings will come, just time, morning and evening, and way."

"Then there is no way to foresee more?" Du Xingyu asked.

"I need to collect more information in this time and space." The technology simulator said that "the universe is composed of material and energy, the trigger of the time and space annihilation bomb, must have an impact on the material or energy in time and space, these are information. "

"Collect enough information, it is possible to make more foresee."

"How to collect information?" Du Xingyu continued.

"Go to space." The Science and Technology Simulator said, "The particles and energy in the time and space will carry information, and you can collect more information."

The space of space is not all, various radiation is the constant propagation energy and information in the universe, and the sunlight is an electromagnetic radiation visible. In addition, there are various micro particles and dark matters that are invisible.

Du Xingyu thinks that he has entered the moon, and the technology simulator is still not available to sufficient information. Longer space travel, look at the current situation, then, only go to Mars!

Go to Mars! Du Xingyu is up to, and he resigned from the bureau in the position of the moon base. Today, the construction of the moon base has entered the right track, and he does not need him to worry.

Du Xingyu put all efforts into Mars mission. In the middle of the year, Mars and Earth will move again to the tracks similar to similar, and will usher in exploring the window period of Mars.

The last time, the Qingxian No. 1 Mars detector and Mars car launched by Huaxia Space Affairs Bureau have been logged in to Mars and has obtained some Mars information.

This time, the Space Administration is intended to continue to launch unmanned detectors and Mars, preparing for landing Mars.

However, Du Xingyu suggested that this time you should launch the manned spacecraft and log in to Mars for research!

"Flying to Mars, detecting satellites, Mars car, etc. have been mature." Du Xingyu thinks, "" Landing wants to have no problem, there is an experience in the moon, establishing a simple Mars base is not a problem. "

"So biggest problem, it is to build a Mars spacecraft!"

Different spacecrafts to Mars and moon spacecrafts, moon spaceships require short-range space sailing, speed, and material carrying requirements are not high.

Mars will also exceed 50 million kilometers from the Earth, and it is more than 150 times the day!

This requires a higher requirements for spaceship, requires it to have faster speeds, stronger load capacity and sailing distance!

"The overall design of the spacecraft should not be difficult, the most difficult or propeller." Du Xingyu quickly found the problem.

According to the experience of human exploration of Mars, the unmanned spacefry is about two hundred days to fly to Mars.

This is because the road is far away. In order to reduce fuel consumption, the spacecraft has to fly along the "Hogman Transfer Orbit" of the Earth Mars, ie, an elliptical transition track that is tangent to two concentric circles in the same plane.

On this orbit, the spacecraft should be accelerated or decelerated in both elliptical tracks, which increases many additional navigation distances.

In this way, it will waste a lot of time. In Du Xingyu, the space navigation speed and time from Earth to Mars is more important than fuel consumption.

If you take a straight line, use a more advanced propeller, starting from the Earth to Mars, will shorten the original six-sixth!

Du Xingyu has opened the technology simulator, and he called out the original nuclear rocket propeller.

Nuclear Heat Rocket Propeller is absolutely satisfied with the speed of speed. It can accelerate the spacecraft to the third universe speed in a short time, which is 16.7 kilometers per second.

Now the current chemical rocket is generally around 10 kilometers per second, and a large number of chemical fuel is required.

However, in space sailing, spacecraft mainly rely on inertia, if continued acceleration, nuclear thermal rocket also consumes liquid hydrogen and liquid oxygen, a long distance, and fuel will be insufficient. That's why it has so far's speed of spacecraft, and it is necessary to rely on the reason for the arrival of planet. Existing spacecraft cannot carry so much fuel!

"Compared to the nuclear rocket propeller is more suitable for flying in the air and near the ground. And the Mars spacecraft needs to be flying in the Earth atmosphere, space and Mars atmosphere, and the nucleating thruster can be used offset from the atmosphere. "

"Flying in space and requires a higher energy conversion efficiency." Du Xingyu quickly thought of nuclear power rocket in the rocket science branch!

Nuclear power rockets, as the name suggests, use nuclear power generation. And these electricity are used to make electromagnetic fields, controlled ion injection, and initiate ion propellars!

That is, this will be a nuclear power source ion propeller!

Ion propellers can ionize the working fluid, and extract ion accelerate under strong electric fields, push the satellite through the reaction force to conduct gesture adjustments or track transfer tasks.

The ion thrust device has the characteristics of high efficiency, high efficiency and small thrust. Its energy conversion efficiency is extremely high, and only the quality of a small portion can give a high acceleration to the spacecraft, more suitable for long distances than traditional propellers. Space sailing.

Conventional solar panels cannot meet the acceleration requirements of Mars spacecraft, while nuclear power can supply stable electricity for a long time.