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sky,

apparent dome over the earth, background of the clouds, sun, moon, and stars. The blue color of the clear daytime sky results from the selective scattering of light rays by the minute particles of dust and vapor in the earth's atmosphereatmosphere
[Gr.,=sphere of air], the mixture of gases surrounding a celestial body with sufficient gravity to maintain it. Although some details about the atmospheres of other planets and satellites are known, only the earth's atmosphere has been well studied, the science of
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. The rays with longer wavelengths (the reds and yellows) pass through most readily, whereas the shorter rays (the blues) are scattered. An excess of dust, especially in large particles, causes scattering of many rays besides the blue, and the sky "fades" and becomes whitish or hazy. The sky thus is clearest in winter, in the morning, after a rain, over a mountain, or over the ocean. Leonardo da Vinci experimented with light and attempted an explanation of the sky's blue color. The work on light and its behavior by Sir Isaac Newton, Lord Rayleigh, and other physicists provided explanations of rainbows, sky color, mirages, and other atmospheric phenomena.

What does it mean when you dream about the sky?

The sky usually signifies peace and freedom of expression when it is clear and blue. If cloudy and overcast, the sky may be forecasting sadness and trouble.

sky

[skī]
(astronomy)
In the daytime the apparent blue dome resting on the earth along the horizon circle; at night the blue becomes nearly black.

sky

1. the apparently dome-shaped expanse extending upwards from the horizon that is characteristically blue or grey during the day, red in the evening, and black at night
2. outer space, as seen from the earth
3. weather, as described by the appearance of the upper air
References in periodicals archive ?
Sky-High Evenings - A dedicated Skyscraper Curator walks guests through interesting trivia about notable skyscrapers viewable from the hotel's 30th-floor Skyline Club.
However, Burj Khalifa and Sky-high City will both be surpassed by Jeddah's 1km tall Kingdom Tower, which is being developed by backers including Prince Alwaleed Bin Talal Bin Abdulaziz Alsaud's Kingdom Holding Company and Saudi Binladen Group.
To fly sky-high, stunt skaters need to build an extreme vertical--, or speed in one direction.
If our tests show that these dormice are happy using this sky-high super-highway, it means the existing population will be able to extend and settle over a much wider area.
But with a legal test case on sky-high bank charges looming, RBS bosses have seen the writing on the wall and decided to act first.
Even as the DWP offered customers more time to pay sky-high electric bills resulting from last month's heat wave, a city panel voted Tuesday to impose a surcharge to offset rising natural-gas prices.
During explosive eruptions, volcanoes spew sulfur dioxide gas sky-high.
The company's Sky-High Video system comes with either a 24-foot or 40-foot telescopic tripod ($6,500 and $7,500, respectively, including battery and flat panel monitor).
But sellers are apparently confident that these fears have ebbed, and in their wake some sky-high asking prices are on the table.
Tenants wanting smaller spaces in high-profile locations are usually more likely to pay sky-high rents, Mason pointed out.
com aims to break the mould of sky-high premiums for men and women under 30.
The dancers of this troupe from tiny, fabled Monaco are fierce: whistle-clean lines, spot-on turns, supple jumps, sky-high extensions.