Night relax music

Night is a period of time during which, for a certain point on the surface of a celestial body (planet, its satellite, etc.), the central luminary (Sun, star) is below the horizon.

The duration of the "night period" for a certain point depends on its latitude, the inclination of the planet's axis of rotation relative to the plane of its orbit, and the angle formed by the axis of rotation and the direction to the central luminary. The day and night sides of celestial bodies are separated by a terminator