In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One ...

Beyond Neptune lies the Kuiper Belt, a vast region of icy bodies that holds the secrets to the solar system’s formation.

Beyond Pluto lies Eris, the furthest currently-recognized dwarf planet. 90377 Sedna is a planet-like object in the outer reaches of the Solar System currently being considered as a possible dwarf ...

The dwarf planet Makemake, which chills out in the deep freeze of the outer Solar System, might be home to an ice volcano 1.

Over many millions of years, NASA suspects the young world could mature into either of the most common planets found in our ...

A large planet has been spotted orbiting a dwarf star that is just 3 million years old, offering possible clues to how the ...

Ever since William Herschel discovered Uranus in 1781, astronomers have been eager to find new planets on the outer edge of ...

Color Image of Pluto: This is the last and most detailed image sent to Earth before the spacecraft's closest approach to Pluto on July 14. Charon| NASA's New Horizons captured this high-resolution ...

IRAS 04125+2902 b – is really just a baby: only 3 million years old. And because such infant worlds are usually hidden inside ...

On a small dwarf planet called Makemake, astronomers have seen signs of surprising temperature changes. These could indicate that the tiny world, which is about 45 times further from the sun than ...