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 ...

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

Astronomers using the James Webb Space Telescope (JWST) have taken a fresh look at the distant edges of our solar system — ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond Neptune, it orbits the sun every 25,000 years.

The new object could also challenge the hypothesis that there's a "Planet X" or "Planet Nine" beyond Pluto, with gravity affecting dwarf planets and other objects in the Kuiper Belt. That's ...

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 ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

In 2006, updated research led to Pluto ... flying from New York to Houston — it wouldn't be able to clear those objects out of its way. Therefore, it couldn't be classified as a planet and ...

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