Launched in 1977 on a once-in-175-years planetary alignment, NASA's twin Voyager spacecraft turned a Grand Tour of the outer solar system into the longest-running success story in deep-space engineering. Voyager 1 returned the first close portraits of Jupiter and Saturn; Voyager 2 kept going to Uranus and Neptune — the only craft ever to visit all four giants. Rank 19 in the Gallery Sets collection, this three-panel layout reads like mission documentation turned wall art: Jupiter's Great Red Spot, Saturn's rings, then the 2012 interstellar crossing rendered as a final postage panel heading into the Milky Way.