In the frozen outskirts of the solar system, a reddish dwarf planet orbits in silence. Known as Sedna, it is so distant that one trip around the Sun takes more than 11,000 years. For much of that time ...

While for most people Pluto is the most distant planet in the Solar System, things get a lot more fuzzy once you pass Neptune and enter the realm of trans-Neptunian objects (TNOs). Pluto is probably ...

Delve deeper into Sedna’s hostile environment with temperatures plunging to -400°F, a nearly airless surface, and a red-hued landscape shaped over billions of years. Learn why this distant world could ...

Scientists have proposed two experimental spacecraft that could reach one of the farthest known objects in the solar system in as little as seven years. The team of researchers, from Italy, believes ...