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 OF201s 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 ...

Scientists have identified an object about 700km wide inhabiting the frigid outer reaches of our solar system that might ...

Computer simulations show that planets could be flung out of the inner solar system, supporting the possible existence of a ...

New research shows there is at least a 40% chance of the existence of Planet Nine, but scientists are still looking for ...

New James Webb Space Telescope data reveal Pluto's high-altitude haze is a key driver of the climate on the dwarf planet, ...

An international team of astronomers led by University of Galway scientists has discovered the probable site of a new planet ...

The James Webb Space Telescope reveals new details about Pluto's climate. Data confirms that Pluto's haze regulates its ...

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