Why are most artificial satellites visible in the sky in the evening hours after sunset and in the early morning hours, before sunrise?

At this time, the shadow from the Earth is located close to the horizon and the satellite is not eclipsed for most of the visible trajectory.

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.