For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

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

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

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

As a result of the International Astronomical Union’s 2006 demotion of Pluto from planet to dwarf planet, our solar system ...

The International Astronomical Union’s Minor Planet Center, which catalogs new moons and other small bodies in the solar ...

For the unversed, "Planet Nine" is a hypothetical planet which is reportedly larger than Earth that is thought to orbit ...

James Webb Space Telescope observations suggest Pluto’s atmosphere is unlike any other in the solar system, confirming a 2017 ...

For decades, Pluto was thought to be just another frozen rock spinning around the Sun, far from the action and mystery of the ...

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

The newly discovered object, named 2017 OF201, has a 25,000-year orbit and is believed to be a large contender for dwarf ...

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