The International Space Station (ISS) smells terrible because astronauts fart more in orbit.
British astronaut Tim Peake made the rotten revelation as he discussed the time he spent in space during an appearance on the Dirty Mother Pukka podcast.
Asked what it was like to burp in space, Peake replied: "That's a great question, but do you know you don't actually burp in space?
"So when you eat food your body is still digesting your food and producing the gas but those bubbles of gas don't rise up. So there's only really one way that they do come out."
Peake, who spent 186 days on the ISS in 2016, went into more detail about the "really unusual" odour on the ISS.
He said: "It's a little bit like a barbecue that's gone wrong. Burnt meat, scorched, metallic smell - almost like static electricity when you take your jumper off and you've got those static sparks."
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