As telescopes have become more powerful, it’s turned out our solar system is not the only game in town: There are millions of ...

(CNN) — The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have ...

Please sign in or subscribe to access the full content. There are a few ways you could define the edge of the Solar System – for instance, where the planets end, or at the Oort cloud, the boundary of ...