Reading the Alphabet From Space
NASA’s Earth Observatory has tracked down images resembling all 26 letters of the English alphabet using only NASA satellite imagery and astronaut photography. In this image, the letter ‘Y’ is for yardangs, elongated landforms sculpted by erosion and similar to sand dunes, but instead comprised of sandstone or siltstone.
December 29, 2015
via NASA http://ift.tt/1ZzD7Bo