Unidentified Flying Objects (UFOs), or "Unidentified Flying Objects", mean those flying objects that have not yet been identified. Over the years, there have been numerous and varied sightings of UFOs. While most of these sightings can be attributed to natural phenomena, man-made objects, or some other plausible explanation, it is undeniable that there are still a small percentage of UFO sightings that have not yet received a reasonable answer. This undoubtedly leads us to reverie: could these UFOs be the flying machines of an extraterrestrial civilization?

Thinking further, if there were other intelligent civilizations in the solar system, then mankind would have discovered their existence long ago. Therefore, if these UFOs do come from extraterrestrial civilizations, they most likely originated outside the solar system. Such an idea is undoubtedly fascinating, and we cannot completely rule it out.

The next question is, if these assumptions are true, what would theoretically be the propulsion system of a UFO that could travel across the universe to reach Earth? Let's explore it.

According to relevant records, UFOs that are suspected of being extraterrestrial vehicles usually exhibit some incredible flight maneuvers, such as hovering silently in the air for long periods of time, accelerating or decelerating sharply in an instant, and making sharp turns at an angle of 90 degrees or less without slowing down. For them, neither the gravitational pull of the earth nor the inertia of the object seem to play a role.

Considering the enormous distance of cosmic space, even the closest star to us (Proxima Centauri) is about 22.0 light-years away. We all know that a light-year is the distance of a year in a straight line at the speed of light. This means that even traveling at the speed of light can seem quite slow in the vastness of the universe. Therefore, it is reasonable to speculate that if UFOs could travel through the vast universe to reach Earth, they would most likely travel faster than the speed of light.

So, is it possible that there is a power system? , can ignore the gravitational pull of the earth and the inertia of objects, and at the same time sail faster than light? You might think that such a powertrain simply doesn't exist, but it may not be. Because, in theory, the Warp drive is capable of doing just that.

The warp engine, which first appeared in science fiction works, is said to change the geometry of space with powerful energy, thus propelling spacecraft to travel faster than light.

It is worth noting that in 1994, the Mexican theoretical physicist Migiel Acuberi proposed a model known as the "Accuberi Engine". This model is based on the space-time curvature theory of general relativity, which can be simply understood as follows: the warp engine forms a "warp bubble" that wraps the spacecraft by controlling the surrounding space structure, and then compresses the space in front of the spacecraft, and expands the space behind it at the same time, so that the "warp bubble" drives the spacecraft to continue to move forward. In the process, since the spacecraft itself does not move relative to space in the "warp bubble", it is able to travel faster than light without violating the theory of relativity.

According to the general theory of relativity, the essence of gravity is the curvature of space-time. To achieve a warp engine, space-time needs to bend in the opposite direction of gravity, which requires a special kind of energy - negative energy.

In short, the so-called "negative energy" is an energy state that is lower than "zero energy" and has a negative energy value. In other words, as long as you master the "negative energy", you have anti-gravity technology, so that you can ignore the gravitational pull of the earth.

According to the mass-energy equation E=mc², mass and energy can be converted into each other. This means that as long as there is enough negative energy, antimatter can be created to counteract the gravitational effect of positive matter.

To sum up, the warp engine can not only sail faster than light, but also ignore the gravitational pull of the earth and the inertia of objects. This is consistent with the characteristics exhibited by UFOs that are suspected to be extraterrestrial vehicles. Therefore, it is reasonable to speculate that if there are UFOs that can travel through the vast universe to reach Earth, they may use the same powertrain as the warp engine.

Of course, this is only a hypothetical opinion, and you can use it as a reference, and you don't have to take it too seriously. After all, to date, we don't have any conclusive evidence of the existence of extraterrestrial flying machines on Earth.