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

A recently discovered celestial body is rewriting our knowledge of the Kuiper Belt and maybe challenging the existence of the ...

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

Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have ...

A potential new dwarf planet has been discovered in the outer reaches of the solar system, and its existence poses the ...

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

The universe's vastness challenges human comprehension. It contains trillions of galaxies and countless stars. Pluto's ...

When Mercury trines Pluto retrograde on May 27, you could have an unmistakable sense of “I can’t unsee this,” where you ...

The TNO, which are described as minor planets that orbit the sun at a greater distance than Neptune, were found on the edge ...

A US-based trio hunting this elusive world has stumbled on what appears to be a new dwarf planet in the solar system's outer ...

Astronomers have discovered a mysterious dwarf planet, 2017 OF201, far beyond Pluto. This discovery challenges existing ...

Scientists hunting for the hypothetical Planet Nine have discovered a potential new dwarf planet, 2017 OF201, in the outer ...