But in his spare time, Hadfield also makes videos of everyday life in space, which he posts on YouTube.
Here are Commander Hadfield's tips on zero-g living. [Video: Chris Hadfield, Social Media’s Space Star.]
FIRST STOP: How to Brush Your Teeth
Here, Hadfield shows just how weird the familiar act of brushing your teeth in zero-g. Especially when there's no sink. [Watch the video]
NEXT: Can You Cry in Space?
NEXT: How to Make a Space Sandwich
For one thing, fluffy white bread is replaced by a tortilla. Watch in amazement as Robonaut 2 and the Canadarm attempt to rip open the pesky peanut butter pouch. (Not really.) [Watch the video here and see the related story]
NEXT: How to Cook Spinach in Space
Not enough space living for you? Check out this: The Human Body in Space: 6 Weird Facts