Cloudy Sunset In The City Stock Image

A star, in particular the Sun, is at sunset when, due to the rotation of the Earth, it crosses the plane of the horizon and passes from the visible to the non visible hemisphere. That is, when its height is zero, going from positive to negative. In the case of the Sun, this determines the end of the day. The antonym of sunset is ortho. The sunset is also called dusk or dusk