Japanese astronomers have discovered a thin atmosphere around a small celestial body beyond Neptune. This trans-Neptunian object is much smaller than what was previously thought possible to sustain an ...

A team of astronomers led by the Center for Astrophysics | Harvard & Smithsonian has discovered a rare object far beyond Neptune, from a class known as trans-Neptunian objects, that is moving in ...

Astronomers have uncovered a massive new trans-Neptunian object, 2017 OF201, lurking at the edge of our solar system. With an orbit stretching 25,000 years and a size that may qualify it as a dwarf ...

Beyond the reaches of Neptune, the outskirts of our solar system are teeming with thousands of icy celestial bodies like Pluto. For years, it's been an accepted tenet of astronomy that, with the ...