https://www.cnet.com/news/nasa-astronaut-scott-kelly-offers-to-ride-along-on-spacex-bfr-moon-mission/

If Elon Musk and Yusaku Maezawa want a person with some space experience to go along on the planned SpaceX lunar mission, they've already got a volunteer. Retired NASA astronaut Scott Kelly has offered his services.

SpaceX and Elon Musk announced on Monday that Maezawa has purchased all of the available seats on the BFR (Big Falcon Rocket) spaceship for a flight around the moon planned for 2023.