In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

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

NASA's Perseverance rover is exploring a new Mars region called Krokodillen, which is thought to harbor some of the oldest and most intriguing rocks on the Red Planet.

Astronomers have discovered a new dwarf planet, named 2017 OF201, far beyond Pluto's orbit. It takes 25,000 years to orbit ...

A new member of the solar system has been detected, the second-largest of its kind, suggesting there may be more like it ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

Hunting for the building blocks of life? Located in the asteroid belt, Ceres is likely a good bet, study finds ...

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

Scientists suggest a star and its planet are orbiting a second star in two opposite directions in an exotic binary star ...

Scientists have discovered a mysterious new object far beyond Neptune, and it could be one of the most distant dwarf planets ...

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

In a thrilling development that challenges long-held assumptions about the outer reaches of our solar system, astronomers ...