Spelling from SPACE: Nasa expert reveals two year project to find the entire alphabet in satellite images (19)

'Y': The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite captured this false-color image of the Ugab River in Namibia (left). 'Z': the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image of wildfire smoke over Canada (right)