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The twin Voyager 1 and
2 spacecraft continue exploring where nothing from Earth
has flown before. In the 30th year after their 1977
launches, they each are much farther away from Earth
and the Sun than Pluto is and approaching the boundary
region -- the heliopause -- where the Sun's dominance
of the environment ends and interstellar space begins.
Voyager 1, more than three times as distant as Pluto,
is farther from Earth than any other human-made object
and speeding outward at more than 17 kilometers per
second (38,000 miles per hour). Both spacecraft are
still sending scientific information about their surroundings
through the Deep Space Network (DSN).

Interstellar
Mission (Click on the image for a larger view)
The primary mission was the exploration of Jupiter and
Saturn. After making a string of discoveries there -- such as active
volcanoes on Jupiter's moon Io and intricacies of Saturn's rings -- the
mission was extended. Voyager 2 went on to explore Uranus and Neptune,
and is still the only spacecraft to have visited those outer planets.
The adventurers' current mission, the Voyager Interstellar Mission
(VIM), will explore the outermost edge of the Sun's domain. And beyond.
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