Why Uranus Is Tilted on Its Side Remains One of Planetary Science’s Most Puzzling Questions
Astronomers still do not know with certainty why Uranus spins nearly on its side, a feature that sets it apart from every other major planet in the solar system. New analysis and long-running theories point to a violent ancient collision, but researchers say the planet’s unusual moons, rings and internal structure suggest the full story may be more complicated.
