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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 ?
Clear Skies requires utilities to reduce emissions of sulfur dioxide, nitrogen oxides, and mercury by about 70 percent by 2018.
Buildings fell, roads collapsed, the city lights were extinguished and the skies above flooded with stars - a sight that confused some used to the sparse twinkling of a typical L.
Whenever I'm asked to name my favorite ski resort, I usually answer, wherever the snow is deep and the skies are clear.
Boots, skies and poles are all made for the different disciplines of cross country skiing.
New Skies Satellites, an SES GLOBAL company (Paris:SESG)(LuxX:SESG), today announced it has signed a framework agreement with the Netherlands Ministry of Defence to support the Netherlands Armed Forces with satellite communication services on its NSS-7 and NSS-703 satellites.
Similar rates prevail at other resorts and customers without skies of their own willingly pay them.
THE HAGUE, The Netherlands -- New Skies Satellites donates satellite capacity enabling the Red Cross Red Crescent to broadcast TV publicity for massive anti-malaria campaign live from Niger to TV stations across Europe and North America
HAMILTON, Bermuda -- New Skies Satellites Holdings Ltd.
Euronext Paris and Luxembourg Stock Exchange: SESG) and New Skies Satellites Holdings Ltd.
PINK SHEETS:SGBAF) (EURONEXT:SESG) (LuxX:SESG) and New Skies Satellites Holdings Ltd.
This achievement, as well as our ongoing relationship with SSVC and our involvement with the distribution of BFBS TV, is a source of pride for everyone at New Skies.
New Skies also announced that it has closed recent agreements for the addition of several new channels to the company's NSS-806 Latin American video neighborhood, one of the region's leading platforms for video distribution with more than 120 video channels reaching a community of over 3,500 cable headends.