Where is the earth in the universe?

The earth is in the solar system of the Milky Way.

It is difficult to define the position of the earth in the universe. First of all, it is difficult to find a frame of reference. Unless you stand outside the universe, you can clearly see the position of the earth in the universe, just like finding a specific grain of sand on the earth. Although it is difficult, it can still be found slowly. In addition, to define the location, you need coordinates. You also know that the universe is finite and unbounded, just like the surface of the earth, there is always a size, but you can't find the boundary in any direction (the earth

As for the earth being the center of the universe, I can only say that his knowledge of physics, especially astrophysics, is still in the primary school stage. According to the principle of isotropy in the large scale of the universe, all galaxies are in an equal position and have no center.