According to study co-author Dr Fumi Yoshida, Neptune is the only known massive object near the outer Solar System that could ...

The Keck Observatory and NASA’s Hubble Space Telescope may have uncovered a "potential three-body system in the Kuiper Belt," ...

Planet Nine should appear stationary over the course of a single day but show detectable movement over months.

Researchers use the Subaru Telescope in Hawaii to find a small object on the outer edge of the Solar System. Nicknamed ...

NASA launched New Horizons to explore Pluto. In 2019, it visited the furthest object in the Solar System we have seen up ...

Pluto and some other known dwarf planets meet the first two criteria but not the third because they orbit in the Kuiper Belt, a region beyond Neptune filled with small icy debris. When Pluto was first ...

SpaceX launched the third batch of satellites for Amazon's Project Kuiper broadband megaconstellation early on Wednesday ...

A telescope has discovered a new world on the edge of the Milky Way – potentially confirming the ‘Planet X’ theory. Beyond ...

Amazon’s race to challenge SpaceX in orbit is getting a helping hand from its chief competitor: SpaceX, which will launch the ...

Astronomers discover Ammonite, a rare icy object beyond Pluto, challenging Planet Nine theory and offering clues to the solar ...

Amazon is racing to catch up to SpaceX’s Starlink, which currently dominates the market with a constellation of roughly 8,000 ...

Despite the powerful telescopes that modern astronomers have to work with, the distant reaches of the Solar System are still ...