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View of the night sky in July 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.
The color of the sky will vary depending on time of day, local conditions, and perspective of the viewer. An aurora makes this sky green. A yellow sky sometimes appears before a severe thunderstorm. After sunset, the sky darkens to purple, and later black. It is sometimes felt that "obvious" statements, such as "the sky is blue", do not need ...
The red light reaches the observer's eye, whereas the blue light is scattered out of the line of sight. Other colours in the sky, such as glowing skies at dusk and dawn. These are from additional particulate matter in the sky that scatter different colors at different angles. Halos, afterglows, coronas, polar stratospheric clouds, and sun dogs.
Yellow skies are a natural, but rare phenomenon. For premium support please call: 800-290-4726 more ways to reach us
A combination of factors from the time of day to dust in the sky can affect what parts of the visible light spectrum we can and can't see. There's a reason the sky is yellow, green during a storm ...
The Rayleigh sky model describes the observed polarization pattern of the daytime sky. Within the atmosphere, Rayleigh scattering of light by air molecules, water, dust, and aerosols causes the sky's light to have a defined polarization pattern. The same elastic scattering processes cause the sky to be blue.
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) is the scattering or deflection of light, or other electromagnetic radiation, by particles with a size much smaller than the wavelength of the radiation.
The cites are there for the attribution of why the sky is blue, not just because it's blue or else there'd be a sentence in that article with four cites that says "The sky is blue". And while the sky certainly only appears to be blue, ask anyone in the world what color the sky is, and you'll get the same answer, hence the ubiquity of the choice ...