Astronomers are closing in on what looks like a colossal missing piece of the Solar System, a giant planet that appears to ...

Scientists say studying objects like Ammonite, despite their immense distance, offers valuable insight into the solar ...

Some TNOs travel in tilted or elongated paths that defy simple explanation. Their strange movements don’t match the predictions of current solar system models. This odd behavior has sparked new ...

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the discovery of Pluto in the 1930s. Labelled as planet X, prominent astronomers ...