The Aviatr plane looks like the drones that fly over Afghanistan - but the $715 million vehicle is designed to fly over Saturn's largest moon, Titan, a body that has fascinated scientists because of its thick, cloudy atmosphere.
The Aviatr probe is built to take 3D photos of the surface, to help scientists build up a picture of the planet's geology.
At the end of its mission, the 120kg aircraft would dive down to the surface and attempt a landing on Titan's dunes.
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