We interview amateur photographer Colin Rich in this video, which also shows how he and a friend built the balloon (think styrofoam and duct tape) and contains many more of the stunning images that resulted. It's well worth watching.

Colin Rich and William Ahmanson / Barcroft Media
This picture of the curvature of the earth was taken from an altitude of 23.67 miles by a cheap point-and-shoot digital camera connected to a balloon built by amateur photographers Colin Rich and William Ahmanson.