As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

The object is about 700 kilometres wide and lies nearly three times farther from Earth than Neptune. Its highly elongated ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

Thank whoever decided to make the Dark Energy Camera Legacy Survey public for this discovery A trio of scientists have ...

Some astronomers say the strange, clustered orbits of icy rocks beyond Neptune indicate that something big is out there, ...

Earth has a new neighbor that lives far, far away. Scientists from the Institute for Advanced Study's School of Natural ...

Asteroids are the ancient remnants of our solar system's birth, rocky fragments that never formed into planets. Most of these ...

Britain: The police filed charges against Paul Doyle, a 53-year-old accused of driving his car into a crowd at a Liverpool ...

The mystery object, located just a short 15,000 light-years from Earth in our Milky Way galaxy, was spotted emitting unusual ...