One of these came in 1986, when the Voyager 2 probe — one of a duo of Voyager craft sent into deep space — journeyed by the ice giant Uranus, a strange world rotating on its side. When the ...

The sibling duo paved the way for new discoveries. For instance, in 1977, astronomers found rings around Uranus using the Kuiper Airborne Observatory. Uranus became the second-ringed planet in our ...