The sky is blue as a result of Rayleigh scattering. Rayleigh scattering represents the high frequency of gas molecules hitting and absorbing blue light. As the horizon turns pale, the blue light has to pass through more ... More »

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Kids and curious adults alike have long asked the question of why the sky is blue. While science has come a long way in explaining the sky’s appearance, people didn’t always know the answer. But as early as 1509, Leonard... More »

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The sky appears blue because of the scattering of sunlight by atmospheric molecules, or Rayleigh scattering. Rayleigh scattering results in a blue sky because it is most noticeable at shorter wavelengths. More »

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The sky appears blue because of the scattering of sunlight by atmospheric molecules, or Rayleigh scattering. Rayleigh scattering results in a blue sky because it is most noticeable at shorter wavelengths. More »

www.reference.com Science Earth Science

The southern lights, or the "aurora australis," are diffuse sheets of lights in the sky of the southern hemisphere. The aurora australis are the southern hemisphere’s counterpart to the northern lights, or aurora boreali... More »

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On a clear day the sky is blue to deep blue. At dawn and dusk the stretch of sky nearest the sun changes to shades of red, orange and yellow. The color of the sky is primarily determined by the way air molecules scatter ... More »

The sky is a common term for Earth's atmosphere, which is approximately 60 miles thick, according to NASA. The atmosphere is composed of different levels, with the exosphere marking the boundary of space. According to Un... More »