The celestial body’s status as the solar system's ninth planet was withdrawn in 2006. Now some experts say we might want to ...

Pluto was reclassified as a dwarf planet in 2006, but new discoveries and fresh debate are reigniting calls to restore its ...

Easy: Venus is the weirdest planet in the solar system. The most distant major planet from the sun and the last stop before ...

In a groundbreaking discovery, astronomers have confirmed the approach of a “wandering planet” into our solar system. This celestial event has sparked a flurry of scientific interest and speculation.

The head of NASA says maybe Pluto is a planet after all. He is wrong because Pluto is part of the rest of the solar system ...

A newly-discovered planet named Enaiposha, GJ 1214 b, is unlike anything found in our own solar system, similar to a ...

Astronomers now estimate there is at least one planet for every star in our galaxy. These worlds, called exoplanets, are ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

Scientists suggest that a fifth, hidden force linked to dark energy may exist in the solar system but has not yet been ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't been for lack of trying. According to a new paper by Thomas Winterhalder of ...

New simulations suggest binary star systems may be ideal for planet formation, and may produce more gas giants than ...