Both spacecraft reached Jupiter first, capturing the planet’s swirling filigree of storms in unprecedented detail. Voyager 1 bopped from there to Saturn. Scientists were particularly interested in the planet’s largest moon, Titan, which would turn out to be one of the most intriguing spots in the solar system and a potential home of extraterrestrial life. If Voyager 1 didn’t collect enough good data before moving on, Voyager 2 would be redirected to try again. But the flyby worked, allowing Voyager 2 to swoop past Saturn and on to Uranus and Neptune.