%0 Journal Article %T The Color of the Sky %A Frederic Zagury %J Atmospheric and Climate Sciences %P 510-517 %@ 2160-0422 %D 2012 %I Scientific Research Publishing %R 10.4236/acs.2012.24045 %X The color of the sky in day-time and at twilight is studied by means of spectroscopy, which provides an unambiguous way to understand and quantify why a sky is blue, pink, or red. The colors a daylight sky can take primarily owe to Rayleigh extinction and ozone absorption. Spectra of the sky illuminated by the sun can generally be represented by a generic analytical expression which involves the Rayleigh function , ozone absorption, and, to a lesser extend, aerosol extinction. This study is based on a representative sample of spectra selected from a few hundred observations taken in different places, times, and dates, with a portable fiber spectrometer. %K Sky Color %K Rayleigh Extinction %K Ozone %K Aerosols %K Radiative Transfer %K Spectral Analysis %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=24294