The term night sky refers to the sky as seen at night. The term is usually associated with astronomy, with reference to views of celestial bodies such as stars, the Moon, and planets that become visible on a clear night after the Sun has set. Natural light sources in a night sky include moonlight, starlight, and airglow, depending on location and timing.
The night sky and studies of it have a historical place in both ancient and modern cultures. In the past, for instance, farmers have used the state of the night sky as a calendar to determine when to plant crops. Many cultures have drawn constellations between stars in the sky, using them in association with legends and mythology about their deities.
The anciently developed belief of astrology is generally based on the belief that relationships between heavenly bodies influence or convey information about events on Earth. The scientific study of the night sky and bodies observed within it, meanwhile, takes place in the science of astronomy.
The visibility of celestial objects in the night sky is affected by light pollution. The presence of the Moon in the night sky has historically hindered astronomical observation by increasing the amount of ambient lighting. With the advent of artificial light sources, however, light pollution has been a growing problem for viewing the night sky. Special filters and modifications to light fixtures can help to alleviate this problem, but for the best seeing both professional and amateur optical astronomers seek viewing sites located far from major urban areas.
Other articles related to "night sky, sky, nights":
... Night Sky Mine is a 1997 science fiction novel by Melissa Scott set in a future after computer programs have run amok ... Ista Kelly was the sole survivor of a pirate raid on a Night Sky mining platform that was searching a remote region of space for useful gases ...
... Amateur astronomers use a range of instruments to study the sky, depending on a combination of their interests and resources ... Methods include simply looking at the night sky with the naked eye, using binoculars, and using a variety of optical telescopes of varying power and quality, as well as ... for looking at some objects in the night sky ...
... On clear deep nights in unpolluted areas, when the moon is thin or below the horizon, a band of what looks like white dust, the Milky Way, can be seen ... because they move relatively quickly those that fly in near-earth orbit cross the sky in a couple of minutes ... Meteors (commonly known as shooting stars) streak across the sky very infrequently ...
... "The Night Sky" 503 2 ... "The Night Sky" 503 2 ... "The Night Sky" (Radio Edit) 413 2 ...
... The Bortle Dark-Sky Scale is a nine-level numeric scale that measures the night sky's and stars' brightness (naked-eye and stellar limiting magnitude) of a particular location ... Bortle created the scale and published it in the February 2001 edition of Sky Telescope magazine to help amateur astronomers compare the darkness of observing sites ... The colors are from the World Atlas of Artificial Night Sky Brightness, and are provided as a convenience to the reader ...
Famous quotes containing the words sky and/or night:
Warped in the weather, turned beldamish.
Then back came winter on me at a bound,
The pallid sky heaved with a moon-quake.”
—Robert Graves (18951985)
“All night Ive held your hand,
as if you had
a fourth time faced the kingdom of the mad
its hackneyed speech, its homicidal eye
and dragged me home alive. . . .”
—Robert Lowell (19171977)