Raver32 writes: "NASA's two Voyager spacecraft are celebrating three decades of flight as they careen toward interstellar space billions of miles from the solar system's edge. Voyager 2 launched on Aug. 20, 1977, and Voyager 1 launched on Sept. 5, 1977. Both spacecraft continue to return information from distances more than three times farther away than Pluto, where the sun's outer heliosphere meets the boundary of interstellar space. "The Voyager mission is a legend in the annals of space exploration. It opened our eyes to the scientific richness of the outer solar system, and it has pioneered the deepest exploration of the sun's domain ever conducted," said Alan Stern, associate administrator for NASA's Science Mission Directorate, Washington, D.C. "It's a testament to Voyager's designers, builders and operators that both spacecraft continue to deliver important findings more than 25 years after their primary mission to Jupiter and Saturn concluded." Voyager 1 currently is the farthest human-made object at a distance from the sun of about 9.7 billion miles (15.6 billion kilometers). Voyager 2 is about 7.8 billion miles (12.6 billion kilometers)."