On Friday 15 January, Tim Peake became only the third British astronaut (and the first representing the UK) to go for a walk in space.
Due to last around six hours, the walk of Peake and US colleague Tim Kopra was cut short when water started filling Kopra's helmet. However, the mission was still largely successful as the pair replaced a faulty power unit on the outside of the International Space Station - and lasted long enough for Peake to capture the selfie to beat all selfies.
"Today's exhilarating #spacewalk will be etched in my memory forever - quite an incredible feeling!" Peake tweeted.
Peake isn't the first astronaut to snap a 'selfie' in space - though his is the first that places the Earth in the reflection of his visor, leaving the void of space to loom with foreboding menace over his shoulder.
Buzz Aldrin started space vanity off with this image, captured for the Gemini 12 space walk in 1966...
Our vote for 'the most satisfying space selfie composition' (coming to a niche photo award competition near you) belongs to US astronaut Mike Hopkins, who took this amazing image on space walk Expedition 38 in 2013. Incredible.
We seriously need to up our selfie game. By approximately 220 miles.