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The day 's blue sky, clouds and the Moon. The sky is an unobstructed view upward from the surface of the Earth. It includes the atmosphere and outer space. It may also be considered a place between the ground and outer space, thus distinct from outer space. In the field of astronomy, the sky is also called the celestial sphere.
Very light greenish blue. B: Normalized to [0–255] (byte) Sky blue refers to a collection of shades comparable to that of a clear daytime sky. [ 1 ] Typically it is a shade of cyan or light teal, though some iterations are closer to light blue. The term (as "sky blew") is attested from 1681. [ 1 ]
Diffuse sky radiation. In Earth's atmosphere, the dominant scattering efficiency of blue light is compared to red or green light. Scattering and absorption are major causes of the attenuation of sunlight radiation by the atmosphere. During broad daylight, the sky is blue due to Rayleigh scattering, while around sunrise or sunset, and especially ...
Rayleigh scattering causes the blue color of the daytime sky and the reddening of the Sun at sunset. Rayleigh scattering (/ ˈ r eɪ l i / RAY-lee), named after the 19th-century British physicist Lord Rayleigh (John William Strutt), [1] is the predominantly elastic scattering of light, or other electromagnetic radiation, by particles with a size much smaller than the wavelength of the radiation.
For example, an editor may demand a citation for the fact that most people have five digits on each hand (yes, this really happened). [1] Another may decide that the color of the sky is actually aqua rather than blue, pull out an assortment of verifiable spectrographic analyses and color charts to demonstrate that this position is actually ...
The color of water varies with the ambient conditions in which that water is present. While relatively small quantities of water appear to be colorless, pure water has a slight blue color that becomes deeper as the thickness of the observed sample increases. The hue of water is an intrinsic property and is caused by selective absorption and ...
Mars surface color. Yogi Rock, analyzed by the Sojourner rover (July 4, 1997) The surface color of the planet Mars appears reddish from a distance because of rusty atmospheric dust. [ 1] From close up, it looks more of a butterscotch, [ 1] and other common surface colors include golden, brown, tan, and greenish, depending on minerals.
Blue moon. A blue moon refers either to the presence of a second full moon in a calendar month, to the third full moon in a season containing four, or to a moon that appears blue due to atmospheric effects. [1] The calendrical meaning of "blue moon" is unconnected to the other meanings. It is often referred to as “traditional”, [2] [3] but ...