In 1997, a rocket launched from Cape Canaveral in Florida carrying a little robotic spaceship, Cassini. For nearly 19 years Cassini has been falling through the outer solar system, taking incredible photos of the gas giants Jupiter and Saturn and their moons. They're some of the most beautiful images in astronomical history.
Next year its mission will come to an end, and it will fly closer and closer to Saturn and eventually burn up in its atmosphere. Before then, let's have a look at some of the most breathtaking pictures it's sent back.