Jared Isaacman returned from the Polaris Dawn mission he led with SpaceX on September 15.
Isaacman led the first private space walk, which marked a milestone in private space travel.
Isaacman talked about the challenges of living off-world and what felt different during his second space mission.
He likened looking out into the unknown darkness in space to traveling overseas in the 1400s.
The Polaris Dawn mission broke NASA's Earth orbit record and tested new Starlink communication technology.
The crew carried out around 38 science and research experiments to test the impact of radiation on the human body, contributing to SpaceX's goal to learn more about long-duration human missions to Mars and beyond.
Isaacman said that his family was more charged up and enthusiastic during Polaris Dawn than during his first mission, Inspiration4.
Isaacman raised over $240 million for St. Jude during his first mission with SpaceX, named in an effort to inspire support for the hospital.
The Polaris Program is intended to be three missions mapped out over the next six to nine years, with the final mission being the first crewed flight of SpaceX's Starship.
Isaacman anticipates fully reusable Starships becoming a tangible reality within the next decade and launching on a frequent basis.