USA HISTORY

Detailed explanation-1: -Twilight is the time period between (astronomical) dawn and sunrise, or between sunset and (astronomical) dusk. Morning twilight: astronomical, nautical, and civil stages at dawn. The apparent disk of the Sun is shown to scale. Evening twilight: civil, nautical, and astronomical stages at dusk.

Detailed explanation-2: -Twilight is the period between sunset and dusk. During twilight there is still light in the sky. There are three types of twilight: civil, nautical and astronomical. Dusk is the point when the sun is at 18 degrees below the horizon and there is no longer any sunlight in the sky.

Detailed explanation-3: -Civil twilight starts at sunset and ends roughly 45 minutes later, when the sun’s center has plunged six degrees below the horizon-equal to 12 times its own width.

Detailed explanation-4: -"Sunset” is the opposite. It occurs the moment the disc of sun completely disappears below the western horizon. Technically, “dusk” is the period of twilight between complete darkness and sunrise (or sunset). In common usage, “dawn” refers to morning, while “dusk” refers only to the evening twilight.

Detailed explanation-5: -Twilight is the time between day and night when there is light outside, but the Sun is below the horizon. Dubai skyline in twilight. The sky can take on spectacular colors during the period of twilight.