How to prove that the Sun is located and has always been close to the galactic plane?

Evidence that the Sun is close to the middle of the galactic disk is that the middle of the Milky Way nearly coincides with the great circle of the celestial sphere. The velocity vector of the Sun relative to the center of the Galaxy also lies in the galactic plane. This indicates that the Sun has always moved in this plane.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.