Far beyond Neptune, astronomers have finally confirmed a compact clump of icy worlds hiding inside the Kuiper Belt, a feature ...

Astronomers at Princeton University have uncovered evidence that the outer solar system is more structured than long believed ...

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously ...

The Kuiper Belt continues to challenge and inspire, offering tantalizing clues about our cosmic origins. Whether through detached TNOs, high-inclination objects, or extreme orbits, each discovery ...

Because the Kuiper Belt is difficult to observe, astronomers rely on studying the orbits of a limited number of objects to infer the presence of a planet. In the case of Siraj’s study, that number is ...

There may be a warp in the Kuiper Belt, possibly caused by “Planet Y” — a Mercury-to-Earth-sized world that orbits the sun way beyond the orbit of Neptune. Is there a mysterious “Planet Y” orbiting ...

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 ...

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 dubbed ...