How to prove that the Sun is located close to the galactic plane?

The middle of the Milky Way almost 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, which indicates its motion 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.