Topic
Voyager
2 questions tagged Voyager — spanning every one of the seven Ws.
why
Why did the Voyager probes use gravity assists to reach the outer planets?
Gravity assists let a spacecraft steal a little orbital energy from a planet, boosting speed without carrying much extra fuel.
Space explorationVoyager
whose
Whose spacecraft first visited all four giant planets of the outer Solar System?
That was Voyager 2. It flew past Jupiter, Saturn, Uranus, and Neptune between 1979 and 1989.
SpaceVoyager