Question

• What type of technology (spacecraft, ground-based telescopes, the Hubble, etc.) has given us the most knowledge of Uranus and Neptune?

Answer 1

each of these worlds has been visited only once by the 1970s-vintage Voyager 2 spacecraft, which performed hectic observations during brief flybys in the mid and late 1980s. The paucity of information on these two planets has left blank chapters in our understanding of the solar system