Night or nighttime is the period of time between the sunset and the sunrise when the Sun is below the horizon. This occurs after dusk. The opposite of night is day (or "daytime" to distinguish it from "day" as used for a 24-hour period). The start and end points of time of a night vary based on factors such as season, latitude, longitude and timezone.
At any given time, one side of the planet Earth is bathed in light from the Sun (the daytime) and the other side of the Earth is in the shadow caused by the Earth blocking the light of the sun. This shadow is what we call the darkness of night. Natural illumination is still provided by a combination of moonlight, planetary light, starlight, diffuse zodiacal light, gegenschein, and airglow. In some circumstances, bioluminescence, aurorae and lightning can provide some illumination. The glow provided by artificial illumination is sometimes referred to as light pollution because it can interfere with observational astronomy and ecosystems.
Read more about Night: Duration and Geography, On Other Celestial Bodies, Impact On Life
Famous quotes containing the word night:
“All night in the unmade park
After the railings and shrubberies
The birds the grass the trees the lake
And the wild boys innocent as strawberries
Had followed the hunchback
To his kennel in the dark.”
—Dylan Thomas (1914–1953)
“The starting point of the human and the end,
That in which space itself is contained, the gate
To the enclosure, day, the things illumined
By day, night and that which night illumines,
Night and its midnight-minting fragrances,
Night’s hymn of the rock, as in a vivid sleep.”
—Wallace Stevens (1879–1955)
“Parenting is not logical. If it were, we would never have to read a book, never need a family therapist, and never feel the urge to call a close friend late at night for support after a particularly trying bedtime scene. . . . We have moments of logic, but life is run by a much larger force. Life is filled with disagreement, opposition, illusion, irrational thinking, miracle, meaning, surprise, and wonder.”
—Jeanne Elium (20th century)