Why are there interference rings in the image of a star, although the light of the star itself is spatially incoherent?

At large distances from an incoherent light source, the finite section beam turns out to be coherent.

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.