NASA astronaut Rick Mastracchio snapped this selfie during a spacewalk while replacing a failed backup computer relay box at the International Space Station on April 22, 2014. This view of his helmet visor reveals several scratches and smudges acquired while working through the spacewalk.See more photos from his spacewalk here.
Neil Armstrong in Buzz Aldrin's Helmet
Apollo 11 astronaut Buzz Aldrin walks on the moon in July 1969 in this photo snapped by Neil Armstrong, the first man on the moon. If you look closely at Aldrin's visor, you'll see Armstrong's reflection.
Steve Robinson & the Space Shuttle
NASA astronaut Steve Robinson snaps a photo of himself while doing repairs on the Space Shuttle Discovery on August 3, 2008. The shuttle's tiled heat shield is reflected in his visor.
Joe Tanner & Canadarm2
Astronaut Joseph R. Tanner, STS-115 mission specialist, snapped a selfie in his spacesuit during an extravehicular activity (EVA) while the Space Shuttle Atlantis was docked with the International Space Station in September 2006. The space station's Canadarm2 is visible in the reflection of his visor.
Expedition 4 Flight Engineer Daniel Bursch photographs his reflection in the space station's Early External Thermal Control System EETCS radiator as he documents a spacewalk on Feb. 20, 2002.
Japan Aerospace Exploration Agency (JAXA) astronaut Aki Hoshide, Expedition 32 flight engineer, uses a digital still camera to take a photo of his helmet visor, with reflections of planet Earth and the International Space Station, during a spacewalk on Sept. 5, 2012.