It's four months since British astronaut Tim Peake landed back on Earth from his mission on board the International Space Station.
Tim crammed in a lot during his six months up there.
His main job was conducting science experiments, but he still found time to do a spacewalk, run a marathon and give out a Brit Award!
This weekend he's coming into Newsround HQ to tell us about his time in space - and we want to know what you'd ask him!
Send us any questions you have about being an astronaut and we'll do our best to ask them to Tim.
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