Nasa says visiting Titan could revolutionise what we known about life in the Universe Nasa will fly a drone helicopter mission ... How big is space? Dragonfly was selected as the next mission ...

The American designed Sikorsky S-51 was the world's first successful helicopter. It was built under licence in Britain by Westland Aviation, and named as the Dragonfly. The first production ...

Dragonfly is built like a helicopter, able to take short flights in between landings. It will run on what's called a radioisotope thermoelectric generator, or RTG. The RTG runs on radioactive ...