A ninth planet may exist beyond Neptune in the Kuiper Belt, a region populated by icy bodies that orbit the Sun.

The search for Planet Nine has been on for years. Mysterious pulls in the Kuiper Belt have led scientists to believe a hidden ...

In 2016, scientists Michael Brown and Konstantin Batygin suggested that an unseen Planet Nine could explain the unusual orbits of some Kuiper Belt objects, sparking interest in its possible existence ...

It would take between 10,000 and 20,000 Earth years to make one full orbit around the Sun. If it exists, this planet could help explain the unique orbits of some smaller objects in the distant Kuiper ...

The search for Planet Nine, a hidden world beyond Neptune, is heating up as scientists prepare to use a powerful new telescope.

Perseverance HomeMission OverviewRover ComponentsMars Rock SamplesWhere is Perseverance?Ingenuity Mars HelicopterMission ...

Astronomers are investigating the possibility of a hidden ninth planet beyond Neptune, which could explain unusual orbital patterns in the Kuiper Belt.

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the ...

This list of commonly confused terms in astronomy will help you better understand the cosmos and the common phenomena we see ...

The last scenario, Siraj says, would be “puzzling” to astrophysicists and may even suggest the objects are coming from beyond ...

The solar system has nine planets, but in 2006 the International Astronomical Union declared Pluto a dwarf planet, making the ...