Two pairs of Uranus’ 27 moons look to be on a collision course and are expected to hit into each other in two successive crashes.
While studying Uranus’ rings using data from NASA’s Voyager 2 flyby of Uranus in 1986, researchers from the University of Idaho and Wellesley College found the rings have a strange-shaped orbit, caused by the gravitational pull of the moon Cressida.
Voyager 2 passed Uranus on 24 January 1986, at a distance of 81,500km. From that distance, it was able to get a good look at the planet’s weird atmosphere.
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Abigail Beall 