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

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

This discovery provides renewed impetus for studying the Pluto-like planet category and the solar system's unexplored boundaries. It may also guide future missions akin to NASA’s New Horizons, which ...

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

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 ...

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 Solar System might not be as quiet and orderly as we think. Imagine one day looking up and seeing something strange in ...

A new dwarf planet, temporarily named 2017 OF201, has been located in a distant orbit far beyond Pluto. The object, which may be a distant cousin of Pluto, has an orbital path so vast that it ...

Scientists have identified a new minor planet beyond Pluto, enhancing our knowledge of the solar ... miles), placing it amongst known dwarf planets and substantial asteroids like Ceres. Its highly ...

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

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