Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar System. Named 2023 KQ14, this rare “sednoid” follows an unusual orbit that ...

Ever since the International Astronomical Union recognized Haumea and Makemake as dwarf planets in 2008, University of Maine ...

As Voyager 1 pushes beyond Pluto, it reveals a shocking truth,the solar system is far vaster and more mysterious than we ever ...

Every once in a while, space gives us something totally unexpected. Well this time, the solar system is surprising us with a ...

For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

Astronomers using the Subaru Telescope have discovered a strange new body in a weird orbit at the edge of the solar system, ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

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