Retired astronaut Chris Hadfield is one of the most famous astronauts on Earth.
During his three spaceflights, he became well-known for the videos he posted online.
The videos detailed his experience as the first Canadian commander of the International Space Station.
Mr Hadfield told Sky News Australia he feels a great “responsibility” to share his experiences of his time in space.
“It can maybe give other people a chance to make different or more informed decisions with their life,” he said.