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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.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.

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.

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.


In the daytime the apparent blue dome resting on the earth along the horizon circle; at night the blue becomes nearly black.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Skyjack may not solve any mysteries, but this "offbeat (sometimes downright strange) yet mostly fascinating quest book" (Oregonian) undoubtedly moves the discussion forward.
These events were preceded by two key terrorist incidents in the 1970% the attack on Israeli athletes at the 1972 Munich Olympics and "Skyjack Sunday," in which Palestinians hijacked three airliners on one day in 1970.
Interceptor Format: 90-minute adventure film An int'l terrorist attempts to skyjack a C-5 transport plane carrying a top secret Stealth combat jet.
Another leading global powered access brand, Canada's Skyjack, says it is excited to take the show indoors this year at Bauma.
Industria Metalmeccanica con socio unico, Terex Corporation., Deere & Company, Bobcat Company, Sennebogen, Wacker Neuson SE, AB Volvo, Komatsu Ltd., Pettibone Traverse Lift, LLC, XCMG Group, and Skyjack.
Powered access major Skyjack has introduced its Secondary Guarding Lift Enable (SGLE) system, a new solution for secondary guarding of scissors and vertical mast lifts.
SKYJACK by KJ Howe, Headline, PS8.99, available August 2 IN THE second novel from Kim Howe, kidnapping negotiator Thea Paris finds herself in another high-intensity hostage situation, when her flight is hijacked over the Libyan Desert when she is escorting two former child soldiers to freedom in London.
Malcolm Early, vice president for marketing at Skyjack, an access and material handling equipment provider, said that while DC and rough terrain scissors are performing well in the regional market, demand for booms has been higher.
In compliance with the Canadian Standards Association (CSA), the Ministry of Labour, and the Occupational Health and Safety Act, Equipment World has developed their own safety training programs in collaboration with their nationally recognized equipment manufacturers of lift equipment such as Toyota, Skyjack, Genie/Terex, Snorkel and JLG.
Nobody can hijack, skyjack or bicycle- jack the intrinsic relationship between the Congress and the people of this country," said information and broadcasting minister Manish Tewari after Kejriwal said the Congress had hijacked aam aadmi while it supported business leaders such as Robert Vadra and the Ambanis, who have been accused of corruption by the activists.
Skyjack Publishing, Matt Yeo, Managing Director, 44-208-295-5355,, P.