An international research team led by PD Dr. Florian Peissker at the University of Cologne has used the new observation ...

January 5, 2005, is an astronomical anniversary that is not really marked but should be. It saw the discovery of dwarf planet Eris and how those very observations led to a new way to describe the ...

Venture into the extreme outer reaches of the solar system to explore the most distant and enigmatic bodies ever discovered. Meet Sedna, Gong Gong, and Eris as we investigate their strange orbits, ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of confirmed dwarf planets and their moons. From left to right: Pluto (with ...

Scientists have been trying to find a hypothetical Planet 9 that may exist outside our known solar system based on the unusual orbits of certain dwarf planets. But those orbits might not require a ...

Bumper car-like interactions at the edges of our solar system—and not a mysterious ninth planet—may explain the dynamics of strange bodies called “detached objects,” according to a new study. CU ...