White Marble. Photo: NASA/GSFC/Suomi NPP/Flickr
By now you've probably heard of Blue Marble, the super hi-res composite image of earth. It's not the single biggest hi-res picture of our planet, but it is a pretty amazing stitch job. Previously, NASA had released Blue Marble pictures of the Western Hemisphere, Eastern Hemisphere, and Australia. (I've included all of the pictures below in case you missed them.) Now they've released an Arctic image called White Marble that required more stitching than any of the other images. Before we go into that, here's a little background on how these images are made.