https://techcrunch.com/2020/11/16/nasa-sends-baby-yoda-to-space-aboard-spacex-dragon-alongside-astronauts/

NASA added a surprise fifth passenger to the Crew-1 mission currently en route to the International Space Station – a plush The Child (aka Baby Yoda) from The Mandalorian. The doll is what’s known as the “zero-gravity indicator” – typically a soft, small object that is allowed to float free in the spacecraft cabin to provide a simple, but effective confirmation of when it passes into the phase of a spaceflight where Earth’s gravity no longer holds significant sway.

Crew-1’s other four passengers are all actual people – NASA astronauts Michael Hopkins, Victor Glover and Shannon Walker, along with JAXA astronaut Soichi Noguchi. They’re on their way to the ISS to staff it for the next half a year, on NASA’s first operational commercial crew mission, courtesy of partner SpaceX, which certified its Falcon 9 rocket and Crew Dragon spacecraft for human flight earlier this year.