The space shuttle Endeavour is on its way home after a record-breaking 12-day mission aimed at teaching us even more about the universe.
A team of 10 astronauts made five spacewalks, put together a robot and worked on a new lab during the visit to the International Space Station (ISS).
The shuttle is set to touch down in the US state of Florida on Wednesday.
Before heading off, shuttle commander Dominic Gorie told the ISS crew: "We had a great time here."
He added: "It's a strange feeling to want to see your families but not want to leave a wonderful place."
Another shuttle - Discovery - is due to fly to the station in May.