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

Subaru Telescope has made an exciting discovery: a small body beyond Pluto, with implications for the formation, evolution, ...

Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

Readers continue to explore the origins of structured time and share a clever method of counting to high numbers on one hand ...

Ever since the International Astronomical Union recognized Haumea and Makemake as dwarf planets in 2008, University of Maine ...

Since 2017, three interstellar objects have been spotted passing through our solar system: 1I/ʻOumuamua, 2I/Borisov… and just ...

The orbit of Ammonite (red line) and the orbits of the other three sednoids (white lines). Ammonite was discovered close to its perihelion, at a distance of 71 astronomical units (71 times the average ...

Researchers just got a step closer to understanding the origins of our solar system, with the discovery of an object orbiting the sun—dubbed "Ammonite." The findings were recently published in the ...

Astronomers have found 2023 KQ14, nicknamed Ammonite, a rare sednoid with a unique orbit that challenges the Planet Nine ...