Astronaut, musician, champion mustache rocker…
He was not only an astronaut...
NASA/Robert Markowitz / Creative Commons / Via en.wikipedia.org
But also the commander of the International Space Station for six months.
MarcelClemens / Shutterstock
During which time he serenaded Earth with his renditions of David Bowie...
youtube.com / Via reddit.com
He had a great social media presence...
