Where on Earth is the azimuth of some stars never zero, and the azimuth of other stars never 180?

At the Earth’s equator, for stars with b> 0, A = 0, and for stars with b <0, A = 180.

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.