Interstellar migration spacecraft

So far, NASA and other scientific institutions have not found any alien spacecraft or aliens.

However, whenever something is found in space, someone will always think about it in the convenience of alien civilization. For example, Omo, an interstellar celestial body that broke into the solar system before, was also considered by some people as an alien spacecraft, but it was completely unfounded. If an alien spacecraft comes to the solar system, it is unlikely that human beings will observe from a distance, and it is very likely that alien civilization will contact us directly.

According to the general theory of relativity, only wormholes can be used as a passage through space. But making wormholes requires negative mass substances, and at present we know nothing about negative mass substances. This strange substance is only in the theoretical stage.

As things stand, it is still too early to talk about interstellar migration. Although we have discovered many exoplanets, we don't know which ones are livable. Even if some planets are really as livable as the earth, it is unrealistic to immigrate to those planets if there are alien intelligent species like humans on those planets.

At present, human space technology is still at the primary level, and it has been to the moon as far as possible, and no other planets in the solar system have been there. Exoplanets are very far away from the solar system, and the nearest one is four light years, which is an insurmountable gap for human beings at present.

The so-called Sun Cave is actually the Coronal Cave. The temperature and density in this area are much lower than those in other areas, so it looks darker, instead of really breaking a big hole in the sun. So the so-called "spaceship" can't provide any help to interstellar immigrants.