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

Astronomers have discovered a mysterious dwarf planet, 2017 OF201, far beyond Pluto. This discovery challenges existing ...

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

Most of the time, astronomers use high-tech telescopes and expensive equipment to make observations. This time, they just had ...

Scientists had previously believed that no celestial bodies existed in the vast, empty section of space beyond Neptune.

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural Sciences, has discovered an extraordinary trans-Neptunian object (TNO), ...

Cheng, together with graduate students from Princeton University, discovered the potential dwarf planet while searching for ...