That's Apollo 17 command module pilot Ron Evans, on December 17, 1972. The crew was on the way home, coasting through the void between Earth and the Moon. During Apollo 15, 16 and 17, the service module was outfitted with external cameras for lunar observations, and the film for those cameras had to be retrieved via spacewalk, since the service module gets discarded shortly before atmospheric reentry.

The only way to do a spacewalk from the command module was to depressurize the entire capsule. So, during Apollo 17, Ron Evans, Gene Cernan and Harrison Schmitt all had to suit up while Evans ventured outside. The spacewalk was brief, lasting barely an hour.

From Evans’ vantage point on the service module, he would have been able to see the Moon in one direction and the Earth in the other, simply by turning his head. How trippy is that? Many astronauts get vertigo when they first step outside the International Space Station. I don’t know whether the absence of Earth makes that any better or not!

Speaking of Earth, you can see it as a crescent in this picture, peeping over Evans’ shoulder: