After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

The Sun is the largest object in the Solar System. The Sun’s huge gravitational field keeps many other objects – planets, dwarf planets, asteroids and comets – in orbit around it.

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

When it came to discovering Neptune, scientists didn’t need to see to believe. The eighth planet in our solar system was ...

This showed him the planet was in fact in orbit around the Sun ... they are found further out in our solar system.” Given this distance and their pattern of movement, it’s easy to see how ...

Scientists believe Ryugu formed on the outskirts of the early solar system before migrating in toward the asteroid belt, eventually settling into an orbit between Earth and Mars. The team analyzed ...

NASA's technology-demonstrating Advanced Composite Solar Sail System (ACS3) has a bent boom in Earth orbit, a newly released photo shows. The ACS3 spacecraft launched April 23 to test key aspects ...

The study tracks icy bodies subject to some kind of perturbation that’s injecting them into the orbit of Neptune before they leave the solar system entirely ... all of the patterns that ...