Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

A huge haul of 128 newfound satellites might be a hint of past collisions in the planet’s orbit, or something else.

The International Astronomical Union’s Minor Planet Center has announced the discovery of three previously unknown moons of Uranus and Neptune. The latest addition brings Uranus's total moon ...