This phenomenon occurs with the Sun in the sky of Mercury when the planet passes perihelion. For 8 days, the Sun moves in the opposite direction, after which it again changes its course to a straight line. Such a visible movement of the Sun arises due to the fact that when the planet passes perihelion, its angular velocity in orbit for some time exceeds the angular velocity of its rotation.
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.