what is the difference between voyager 1 and 2?
From the NASA Kennedy Space Center at Cape Canaveral, Florida, Voyager 2 was launched first, on August 20, 1977; Voyager 1 was launched on a faster, shorter trajectory on September 5, 1977. ... Voyager 2 was aimed to fly by Saturn at a point that would automatically send the spacecraft in the direction of Uranus.