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

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

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 ...

When you get out past the planets of our solar system and keep going, you will eventually enter the Kuiper belt, which has ...

Brown, a professor of planetary astronomy at Caltech, discovered another small world called Eris in the Kuiper Belt — a vast ring of icy objects beyond Neptune’s orbit that also happens to be ...

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

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

The Subaru Telescope has discovered new objects beyond the known Kuiper Belt, suggesting a more complex structure at the edge ...

The discovery of mysterious objects beyond the known Kuiper Belt could point to a complex structure at the edge of our Solar ...

Project Kuiper is Amazon's effort to enter the satellite broadband business, which could be a large opportunity, but it's taking too much of investor attention. Investor worries about Kuiper ...