The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Astronomers have discovered "Ammonite," a mysterious object on the solar system’s edge whose unusual orbit challenges current ...

Typically, telescopes are synonymous with bringing far-off objects close, but the newest member of the solar system was ...

Learn more about a sednoid called Ammonite that has been detected in the outer reaches of the Solar System.

Would one frozen world, just visible on the rim of the Sun’s kingdom, turn decades of speculation on the concealed layout of ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

In 2003, NASA-funded researchers spotted what was then the most distant object discovered in our Solar System. The dwarf ...

KQ14, nicknamed "Ammonite", was discovered using the Subaru Telescope and is a highly elliptical object with a perihelion and ...

Astronomers have discovered a new world circling the outer edges of our solar system. So far, there are only four known ...

Researchers just got a step closer to understanding the origins of our solar system, with the discovery of an object orbiting ...

A new celestial object has been uncovered on the edge of our solar system, revealing another piece of the vast puzzle that is our cosmic neighborhood. Discovered using the Subaru Telescope at Mauna ...

Despite the powerful telescopes that modern astronomers have to work with, the distant reaches of the Solar System are still ...