The European Space Agency has made history by successfully landing a robot on a comet in deep space.
After a ten-year journey across the Solar System, a probe called Philae became the first spacecraft to ever land on a comet.
The probe was released from a mothership called Rosetta. It had to be released at exactly the right time to ensure a successful landing.
Could you land space probe Philae on the comet? Test your skill with this interactive game.
In real life the landing took about seven hours, but the game speeds things up for you.