Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

Add Yahoo as a preferred source to see more of our stories on Google. Digital art of distant planet - Dottedhippo/Getty Images On August 24, 2006, our solar system lost a planet. It wasn't by ...

The Keck Observatory and NASA’s Hubble Space Telescope may have uncovered a "potential three-body system in the Kuiper Belt," ...

Astronomers at Princeton University have uncovered evidence that the outer solar system is more structured than long believed. Led by astrophysics doctoral student Amir Siraj, the research points to a ...

Astronomers might have found evidence of a structure located farbeyond Neptune, potentially giving us clues about the solar system’s primordial past. This discovery involves a dense concentration of ...

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 ...

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 ...

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 Kuiper belt as a research area encompasses the systematic investigation of the trans-Neptunian region of the Solar System populated by icy planetesimals, dwarf planets, and small bodies beyond ...

A Sanjay Limaye, planetary scientist at the University of Wisconsin-Madison Space Science and Engineering Center: The Kuiper belt, named after astronomer Gerard Kuiper, is a massive, icy region of our ...