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Crescent Moon Rising and Earth’s Atmosphere
On Feb. 1, 2014, Japan Aerospace Exploration Agency astronaut Koichi Wakata tweeted this view of a crescent moon rising and the cusp of Earth’s atmosphere. Distinct colors are visible because the dominant gases and particles in each layer of the atmosphere act as prisms, filtering out certain colors of light.
Via NASA News and Features.
(Source: r-u-i-n-o-u-s, via hauntedvip)
Robertson’s crew drive patent application.
A Robertson’s crew drive, also known as a square,or Scrulox screw drive has a square-shaped socket in the screw head and a square protrusion on the tool.
Peter Lymburner Robertson invented the Robertson screw and screwdriver in 1908 and received patents in 1909 (Canada) and 1911 (U.S. Patent 1,003,657)
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Green Tara - Joseph Skala
Drawn by Dave Stevens
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Bridget Riley, Untitled (Study for Blaze), 1962 Pencil on paper
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