This weekend marks the 40th anniversary of the launch of Voyager 2 which, at the time, confused the heck out of the press and public because it actually launched before Voyager 1. Why did they launch the second probe first? Because Voyager 2 was going to follow a longer trajectory to reach the Jupiter system, allowing it to fly by Saturn, Uranus, and Neptune. Voyager 1 launched 16 days later on a faster track optimized to fly by Jupiter, Saturn, and make a relatively close pass of Saturn’s intriguing moon Titan.
The missions, of course, were smashing successes.
And another Voyager web page worth visiting