Reflections on Planet Earth . ... Credit Copyright: Michael Fossum, STS-121 Mission , NASA Explanation: Catching sight of your reflection in a store window or shiny hubcap can be entertaining and occasionally even inspire a thoughtful moment. ... The picture is actually a self-portrait taken by astronaut Michael Fossum on July 8 during a space walk or extravehicular activity while the Discovery orbiter was docked with the International Space Station . ... NASA Official: Jay Norris. ...