Samantha Cristoforetti holds the record for longest uninterrupted spaceflight by a European astronaut - but you may know her for another bit of history.
She is the first person to make a TikTok video on board the International Space Station (ISS).
Cristoforetti has become a star on the social-media site, where her videos have had millions of views.
Italy's first female astronaut is using her second space mission to help TikTok reach the final frontier.
Cristoforetti first travelled to space in 2014, spending 199 days on board the ISS - then the record for the longest mission in space by a woman, although that has since been broken by Peggy Whitson, in 2017, and subsequently Christina Koch, in 2019.
