Reading the ABCs from Space
A few years ago, while working on a story about wildfires, a V appeared to me in a satellite image of a smoke plume over Canada. That image made me wonder: could I track down all 26 letters of the English alphabet using only NASA satellite imagery and astronaut photography?
With the help of readers and colleagues, I started to collect images of ephemeral features like clouds, phytoplankton blooms, and dust clouds that formed shapes reminiscent of letters. Some letters, like O and C, were easy to find. Others—A, B, and R—were maddeningly difficult. Note that the A below is cursive. And if you can find a better example of any letter (in NASA imagery), send us an email with the date, latitude, and longitude.
To see more: http://earthobservatory.nasa.gov/Features/ABC/