What is the internal structure of UFO?

1, UFO refers to unidentified flying objects (UFOs, abbreviated as UFOs), which refer to objects of unknown origin and nature floating and flying in the sky. Because the internal structure of unknown so is of unknown origin.

Some people think it is a spaceship from other planets, while others think UFO is a natural phenomenon. UFO-like flying objects have been found over the United States since the 1940s. At that time, newspapers called them "flying saucers", which was the beginning of contemporary people's interest in UFOs. Later, people focused on UFO reports around the world, but so far, no universally accepted evidence has been found to prove that they came from extraterrestrial civilization. Some photos of UFOs are considered as scams by experts, while others are considered as ball lightning or other natural phenomena. But some of them have been found to be unable to be explained by existing scientific knowledge, and may be explained by new scientific knowledge in the future.