OF201, the object belongs to the same all-star family as Pluto: dwarf planets. Its diameter, roughly 435 miles (700 km), is ...

Researchers believe that 2017 OF201’s highly eccentric orbit points to a chaotic origin, possibly caused by a gravitational ...

Astronomers have uncovered a distant celestial body that may be a new dwarf planet, orbiting the Sun from more than twice the distance of Pluto. Found by researchers at the Institute for Advanced ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new ...

New data captured by the James Webb Space Telescope has finally given astronomers new clues about how Pluto cools itself.

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be fair—but one of the largest yet discovered and with an orbit around the Sun that ...

A newly detected planet beyond Pluto is not just expanding our understanding of the Solar System, it might be quietly rewriting it. Astronomers from the University of Taiwan recen ...

As a result of the International Astronomical Union’s 2006 demotion of Pluto from planet to dwarf planet, our solar system ...

In the study titled, Evidence of haze control of Pluto's atmospheric heat balance from JWST/MIRI thermal light curves, astronomers revealed that they detected and measured the thermal emission of ...

The first observations of Pluto by NASA's James Webb Space Telescope (JWST) reveal dramatic phenomena on its surface, like ...