All 26 letters of the English alphabet are represented here using only satellite imagery and astronaut photography. If you are a Scrabble or Words with Friends aficionado, use seven of the letters to spell out words related to the earth sciences for our December puzzler. See the full alphabet at <a rel="nofollow" class="external free" href="http://go.nasa.gov/1mrIpAl">http://go.nasa.gov/1mrIpAl</a>.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/68824346@N02">NASA's Earth Observatory</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/nasaearthobservatory/23456969264/">Reading the ABCs from Space</a>