One evening in January 2015, Terry Virts, a Nasa astronaut onboard the International Space Station (ISS), decided to pop over to the Russian quarters, catch up with his Russian colleagues and check out the view. For views, nothing beats the space station. From this orbiting perch approximately 250 miles (400km) above the Earth, scores of astronauts have waxed lyrical about the beauty of our planet: its mesmerising, fast-motion sunrises and sunsets, its brilliant colours and startling fragility.
As a 47-year-old former space shuttle pilot, then on his second visit to the space station, Virts had experienced all of this himself and would do so many times again. But this night would be different.
