One redditor has been upvoted all the way to the International Space Station (ISS).

Chris Hadfield, 53, was the first Canadian astronaut to walk in space and already had an active presence on Facebook and Twitter. Before traveling to the ISS on Dec. 19, however, he joined social news site Reddit.

Hadfield hosted a live-interview, known as an AMA, on the site about a week before he left and set up his own FAQ of standard interview questions in the comments to avoid repeats from other redditors. He proved no topic was off-limits as he covered everything from sex in space and pooping to his opinion on the food aboard the ship. He even debunked a popular myth.