The International Astronomical Union’s Minor Planet Center, which catalogs new moons and other small bodies in the solar ...

NASA scientists expected something strange when they planned a mission beyond Pluto - but Arrokoth exceeded all predictions. This object, discovered after New Horizons launched, turned out to be a ...

The Altjira system is part of the same family of KBOs as another object named Arrokoth. NASA’s New Horizons spacecraft visited Arrokoth in 2019, revealing its peanut-like shape. That shape told ...

Astronomers announced the discovery of a new dwarf planet, provisionally named 2017 OF201, located in the remote outskirts of ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system. The object—which orbits out beyond Neptune—has been named "2017 OF201" by the ...

Another target was the Kuiper Belt and, specifically, an object called Arrokoth. NASA says Arrokoth is the most distant object that a human-made craft has explored up close. Along the way ...

NASA’s New Horizons flyby of Arrokoth in 2019 revealed a pristine, contact-binary KBO resembling a cosmic snowman, confirming that gentle mergers built many of these remote bodies. When the ...

The Kuiper belt is also a prime target for space missions. New Horizons, after its flyby of Pluto in 2015, explored another object in this region, Arrokoth, in 2019. How do we detect a distant planet?