All human immigrants

First of all, let's clarify the definition of aliens, aliens: human beings' collective name for intelligent creatures outside the earth.

There is a basic condition. When humans migrate to other planets, newborns will inevitably be born on other planets. That is to say, it is divided into: earth migration A and planet rebirth B?

To answer this question, we must set the premise.

1. When humans migrate to other planets, are there still people on the earth?

1, someone. Suppose we set: Earth aborigines: C, then the above problem is decomposed into the following.

● Earth immigrant A, will you think C is an alien in a few years?

No, because AC is from the earth, they already know each other, and more just think that they have gone out to develop, and their home is still the earth.

● Planet B is a freshman. Will you think C is an alien in a few years?

Yes, this is determined by geographical isolation. Planet freshman B will think that he is Planet X (if Mars is born, he is a Martian). They will also think that people on other planets are aliens.

● Earth aborigine C, will you think A is an alien in a few years?

No, for the same reason as the first one, because they all know each other.

● Earth aborigine C, will you think that B is an alien in a few years?

No, because in C's understanding, B is A's child, A is an earthling, so B is also an earthling.

2, no one, the whole earth all migration.

If so, there will be no aliens, and some people may stubbornly insist that they are still earthlings. However, with their death. All the migrating human beings become people of Planet X. The so-called aliens are: intelligent life outside Planet X..

Of course, if there are interstellar immigrants, I think there will be earthlings and aliens, because of the differences in politics, concepts, ecology and values. There is bound to be a war in the future.

Unless, people just regard the migrated planet as a land resource and bring it into the earth's ecosystem. For example, the x sector of the earth. So this just expands the area, and nothing else has changed.