Spaceman, Earthman.

In March 1969 Russell Schweickart found himself with five minutes’ peace during a spacewalk on Apollo 9, the Earth orbital mission that flight-tested the lunar lander. He later wrote: ‘on that small spot, that little blue and white thing, is everything that means anything to you—all of history and music and poetry and art and death and birth and love, tears, joy, games, all of it on that little spot out there that you can cover with your thumb’. In this remarkable photo, the Earth is reflected in Schweickart’s helmet. (NASA)