Knowra Night Night Night is the dark interval between sunset and sunrise at a location, caused by Earth’s rotation away from the Sun. It is also a customary period for sleep and rest.
Earth's rotation : Earth’s spinning motion around its axis, which produces the daily cycle of daylight and darkness. A location enters night as Earth rotates it away from direct sunlight.
Sleep : A recurring state of reduced responsiveness and altered brain activity that supports health and restoration. Night is the customary sleep period for many people, though biology and schedules vary.
Nocturnality : A pattern of activity in which an organism is chiefly active at night. Night provides the primary activity period for nocturnal species.
Day : The interval when a location is illuminated by the Sun above its horizon. Day is the illuminated counterpart to night in the daily cycle.
Night sky : The portion of the celestial sphere visible above the horizon after darkness falls. Its stars, planets, and changing appearance make night a setting for observation and storytelling.
Twilight : The periods of diffuse natural light before sunrise and after sunset, when the Sun lies below the horizon. Twilight marks the gradual transition into and out of night.
Shift work : Employment organized outside conventional daytime hours, often including overnight shifts. Working through the customary rest period can disrupt sleep timing and circadian alignment.
Artificial light at night : Human-made illumination used during the natural nighttime period. It can alter animal behavior, ecological interactions, and human exposure to darkness.
Polar night : A period in polar regions when the Sun does not rise above the horizon for at least 24 hours. It is an extreme seasonal form of night, lasting far longer than an ordinary night.
Night in literature : The depiction of nighttime in literary works, often as a setting or symbol. Writers use night to frame secrecy, danger, intimacy, sleep, and reflection.
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