Voyager 2 and Uranus. Computer artwork of the Voyager 2 spacecraft approaching the planet Uranus. Voyager 2 is a space probe launched by NASA on 20th August 1977 to study the outer Solar System and eventually interstellar space. It's closest approach to Uranus occurred on 24th January 1986, when it came within 81,500 kilometres of the planet's cloud tops. It is still the only spacecraft to have visited the two outer giant planets Uranus and Neptune.