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'''Voyager 1''' is a robotic spacecraft launched to explore the outer [[solar system]] by [[NASA]]. It was launched from Cape Canaveral on September 5, 1977 and has since toured the major planets, using each for a gravity assist, to alter the speed and trajectory of the craft. Voyager 1 passed by [[Jupiter]] on July 9, 1979 and [[Saturn]] on August 25, 1979. Voyager 2, it's twin, also passed by [[Neptune]] and [[Uranus]]. With these two craft (plus the earlier Pioneer Missions) much more information was learned about these outer planets.
As of February 2008, Voyager 1 was at a distance of 9.8 billion miles (105.3 [[Astronomical unit|Astronomical Units]] (AU)) from the Sun. Voyager 1 is escaping the solar system at a speed of about 3.6 AU per year. Voyager 1 crossed the Termination shock on December 16, 2004, the area of space where the solar wind approaches the boundary of the heliosphere, and a termination shock forms where this wind abruptly slows down to about 250,000 miles per hour. <ref>http://voyager.jpl.nasa.gov/mission/fastfacts.html Voyager Mission Fast Facts</ref>
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