![]() Eventually, scientists hoped that the twin probes would be able to explore the outer reaches of the solar system. ![]() For one thing, four planets - Jupiter, Saturn, Uranus and Neptune - were in an alignment that only happens once every 175 years, allowing for the possibility of low-energy travel to those planets by the Voyagers. How is that possible, and why is it important? The Amazing Optimism of Voyager and the Golden Recordĭespite the initial plan to explore just Jupiter and Saturn, the folks who planned the Voyager mission did have larger goals than that in mind. And yet today, 45 years after they were launched, they’re still hurtling through interstellar space, at a greater distance than human-made objects have ever been from Earth. The probes were originally designed to last just five years. ![]() When NASA sent Voyager 1 and Voyager 2 out in the 1970s, the mission was simple: explore Jupiter, Saturn and the moons of those two planets. NASA’s Voyager program is one of the most important instances of space exploration in the long history of that very ancient human desire. ![]()
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