* Astronomy

Voyager 1 was one of a pair of spacecraft launched to explore the planets of the outer solar system and the interplanetary environment. Each Voyager had as its major objectives at each planet to: (1) investigate the circulation, dynamics, structure, and composition of the planet's atmosphere; (2) characterise the morphology, geology, and physical state of the satellites of the planet; (3) provide improved values for the mass, size, and shape of the planet, its satellites, and any rings; and, (4) determine the magnetic field structure and characterize the composition and distribution of energetic trapped particles and plasma therein.
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Voyager 1 & 2 Trajectories to the Outer Planets

Recalculating the Distance to Interstellar Space

Scientists analysing recent data from NASA's Voyager and Cassini spacecraft have calculated that Voyager 1 could cross over into the frontier of interstellar space at any time and much earlier than previously thought. The findings are detailed in this week's issue of the journal Nature.
Data from Voyager's low-energy charged particle instrument, first reported in December 2010, have indicated that the outward speed of the charged particles streaming from the sun has slowed to zero. The stagnation of this solar wind has continued through at least February 2011, marking a thick, previously unpredicted "transition zone" at the edge of our solar system.
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Spacecraft from 1970s to journey beyond the sun

Two spacecraft launched in the 1970s are now approaching the edge of the solar system.
The unmanned 'Voyagers' have already reached where no manmade objects ever have before, and will soon journey beyond the influence of the sun.
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Voyager Humanity's Farthest Journey