Is it useful? If it works, we can use magnetic power to make a submarine with an engine. You don’t need to believe this magnetic submarine. Let the facts speak for themselves. Thank you for your invitation!
For me, reliability has the following measures:
Based on current technology and science,
I have not found that science fiction spacecraft are on course,
With the advanced scientific and aerospace technology of various countries,
it is credible to discover the existence of objects and people in the universe.
Let me answer, combining science fiction and real science.
First, warp flight: This is a technology for sailing in compressed space and time. Its principle is to rely on the antimatter energy engine of the starship to create an artificial position to distort space and time. Speeds in space can reach dozens of times the speed of light. Warp speed is divided into levels 0-10. Except that level 0 and level 10 are just theoretical, as the level increases, the speed will get faster. Warp speed is a virtual technology, but based on reality, it can be realized in theory.
Second, controllable nuclear fusion propulsion: Nuclear fusion is a physical process that combines different atomic nuclei to produce huge energy. Most fusion reactors are designed to control nuclear fuel through magnetic fields. This device called a "tokamak" is a ring-shaped container that controls nuclear fusion. It can ensure the safe operation of the reactor and passengers do not have to worry about the reactor going out of control.
Unfortunately, the tokamak equipment is extremely heavy, so researchers are considering using another way to trigger fusion to control the reactor, such as using high-energy lasers to control nuclear fuel particles to cause micro-explosions, and then The magnetic field is used to spray the generated hot plasma gas to the rear of the spacecraft to obtain propulsion.
In the 1970s, the United Kingdom launched the Daedalus Project to conduct research on this type of rocket. Their goal is to build a fusion rocket vehicle that can reach another star within 50 years. The fly in the ointment is that despite decades of research work, researchers have yet to achieve normal commercial operation of such a fusion reactor (China has currently achieved certain results in nuclear fusion energy).
Third, ion thruster: Traditional rockets rely on ejecting gas backward at high speed to obtain forward thrust. This is the principle of action force and reaction force. Ion thrusters use the same physics, but instead of ejecting hot gas, they eject a beam of charged particles, or ions, that gain reaction force and fly forward.
The thrust provided by the ion thruster to the rocket is actually very weak, but to obtain the same thrust, it uses much less fuel than ordinary fuel rockets, and it can work very stably for a long time. However, the time it takes to accelerate to very high speeds is slower than that of a traditional rocket.
Ion thrusters have begun to be equipped on spacecraft, such as Japan's Hayabusa probe and Europe's SMART-1 lunar probe, and this technology is still being improved. For example, there is a particularly promising new ion thruster. Its working principle is slightly different from other ion thrusters. It uses a strong electric field to accelerate ions. This kind of thruster can make ions hover at a fixed frequency, and then the thruster adjusts the frequency of its own radio signal transmitter to be consistent with the ions, thus injecting more energy into the ions, and can even heat the ions to 1 million degrees. When the ions are ejected, the thrust produced is greatly increased.
After theoretical calculations, this new ion thruster can allow the rocket to reach Mars from the Earth in 39 days, which is a bit of progress.
Fourth, light sail propeller: Just as traditional sails draw on the power of surface wind, solar sails draw on the power of solar energy flow. Solar sails do not need to carry additional fuel. They can reach very high speeds by only using the light pressure of sunlight on the sails, although it will also take a long time.
Solar sails have been successful in laboratory conditions on Earth, but attempts to test them in orbit have been repeatedly frustrated.
For example, in 2005, the World Planetary Society launched the "Universe One" spacecraft, which used solar sails as space power, but the rocket failed and crashed when taking it into space; the second attempt to launch the solar sail spacecraft was also due to rocket failure. And failed.
Despite this, solar sails are still a very promising technology, at least for travel within the solar system, because sunlight can provide strong thrust. However, if humans use solar sails to propel spacecraft for interstellar travel, the thrust of light pressure will still be somewhat insufficient.
Science is science, science fiction is science fiction.
The things in science fiction works only need to be fun to look at, but they cannot be taken seriously. The director of "The Wandering Earth" graduated from our school. It is said that he consulted experts to discuss how to make the film reasonably. But the final conclusion is that, unfortunately, it cannot be filmed based on real scientific theory. I have also written online articles. According to my personal understanding, most of the readers do not understand professional knowledge. They just want to see miracles, miracles, and fun. Scientific theories give people a sense of powerless limitation.