The two space probes Voyager 1 and Voyager 2, were launched in 1977. In August 2012 Voyager 1 became the first man-made object to enter inter-stellar space. Voyager 2 was launched first to allow it to fly by Jupiter, Saturn, Uranus and Neptune. Voyager 1 was able to fly by only Jupiter and Saturn, where it came close to Saturn’s largest moon, Titan.
Voyager 1 weighs 773 kilograms and the main body of the space craft is about the size of a small car. The longest boom is 13 metres long.
This model of the Voyager 1 space probe is one third the size of the real thing and was built by Dave Coulthard, one of the scientists responsible for the solar system model.
For more information about the Voyager program go to: http://voyager.jpl.nasa.gov