coondoggie writes "NASA is today celebrating one of its most successful space programs ever: Voyager. Voyager 2 launched on Aug. 20, 1977, and Voyager 1 launched on Sept. 5, 1977 and between them, they have explored all the planets of the outer solar system, Jupiter, Saturn, Uranus and Neptune; 48 of their moons; and the unique system of rings and magnetic fields those planets possess. And the craft continue to run smoothly and send back information from distances more than three times farther away than Pluto. NASA notes that even though most of the launch vehicle's 700 ton weight is due to rocket fuel, Voyager 2's travel distance of 4.4 billion miles from launch to Neptune results in a fuel economy of about 30,000 MPG. As Voyager 2 zips out of the solar system, this economy will get better.
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