Why are the solar system, the Milky Way and other galaxies almost on the same plane?

Why is the sun called the solar system? Because the solar system is centered on the sun, other planets revolve around the sun, forming an operating system called the solar system. Because of the great mass and gravity of the sun, other planets in the solar system are attracted by it and rotate around it, forming the solar system. In addition, because of the consistency of gravity, the planets all move in the same plane, so it seems to me that they are faceted. Planets in the same galaxy motion system all have * * * area direction, because the direction of force comes from the same direction. However, there are many small galaxies in the big galaxy, because some stars with large mass in the big galaxy will also have an impact on the motion of the surrounding asteroids, and their gravity is obviously better than that brought by the center of distant galaxies, which may have an impact on the trajectory of asteroids.

When you ask why the solar system, the Milky Way and other galaxies are almost on the same plane, you are sure that they are on the same plane, which is actually very inaccurate. Because the concept of plane is infinite and abstract. When we say an object, the mesa is a plane, which is the limited range of the mesa. We can easily understand what the plane you are talking about, and even we can say that the plane of the table is perpendicular to another plane. But the plane you mentioned in the question can be wide, thick and long, just like a three-dimensional cuboid. I can say that this cuboid is also a plane, so no matter how the lines or figures in this cuboid are arranged, they are all on the same plane.

Generally speaking, they are on a plane, which seems to be true; From a small point of view, they seem to be on the same plane, but in fact they are. Mainly from the perspective of observation.