Showing posts tagged colors
circumhorizontal arcs photographed by (click pic) david england, andy cripe, del zane, todd sackmann and brandon rios. this atmospheric phenomenon, otherwise known as a fire rainbow, is created when light from a sun that is at least 58 degrees above the horizon passes through the hexagonal ice crystals that form cirrus clouds which, because of quick cloud formation, have become horizontally aligned. (see also: previous cloud posts)
18th century instrument to determine the sky’s ‘blueness’ called a Cyanometer:
The simple device was invented in 1789 by Swiss physicist Horace-Bénédict de Saussure and German naturalist Alexander von Humboldt who used the circular array of 53 shaded sections in experiments above the skies over Geneva, Chamonix and Mont Blanc.
via This is Colossal
dionys moser photographs the alien like landscape of the ethiopian dallol hydrothermal field, a vast area of uplifted thick salt deposits affected by intense fumarolic activity, famous for being the only known volcanic area bellow sea level and for being both the hottest place on the planet, with average annual temperatures well above 30 degrees celsius, and the most colourful, with its pools of a hot sulfuric acid brine and ferrous multicolored salt deposits.