Back From Orbit for the Last Time, With Pictures

The first Canadian astronaut to walk in outer space has just published a book of photographs he took during his five-month stint at the International Space Station (ISS) and was fielding questions from fans at a book signing in Union Square.

Canadian astronaut Chris Hadfield shortly after his landing in central Kazakhstan on May 14, 2013. He had spent 5 months in the International Space Station and took over 45,000 pictures of earth, compiling 192 of them into a book, “You Are Here: Around the World in 92 Minutes.” Sergei Remezov/AFP/Getty Images