The reason this is so cool and important is what this implies. That there is probably another extremely large object orbiting our sun so far away we can't see it. All we can see is the effect it has on Sedna, as it's immense mass causes a gravitational pull strong enough to pull Sedna's orbit into this weird shape.
The dancing light of the auroras on Saturn behaves differently from how scientists had thought possible. By choreographing the instruments aboard the Earth-orbiting Hubble Space Telescope and the Cassini spacecraft, while it was enroute to Saturn, to look at Saturn's southern polar region, scientists found in 2005 that the planet's auroras, long thought of as a cross between those of Earth and Jupiter, are fundamentally unlike those observed on either of the other two planets.