When Social Media Lead for NASA's Earth Observatory Adam Voiland noticed a "V"-shaped cloud of smoke in a satellite image one day, he wondered if he could find all 26 letters of the alphabet.
It wasn't an easy task.
"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," Voiland wrote in a post for NASA. "Some letters, like O and C, were easy to find. Others—A, B, and R—were maddeningly difficult."
Eventually he tracked them all down. Here are the letters of the alphabet — a mix of uppercase and lowercase — as seen in stunning satellite images of Earth.
You can also read the original Earth Observatory post here. It includes some pretty great rhyming captions.
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CHECK OUT: This is what the entire universe looks like in one image
A: An astronaut took this image of the Utah Green River doubling back on itself on January 22, 2014.
B: The Landsat 8 satellite captured this image of the Arkansas river running through the Holla Bend Wildlife Refuge on August 4, 2014.
C: An astronaut took this photo of an artificial island chain at the edge of Bahrain Island on January 23, 2011.
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